150 Two black and white oak framed aerial photographic prints of the Mohne Dam before and after the Operation Chastise "Dam Busters" strike on May 16th 1943, the post strike photograph signed by surviving members of 617 Squadron also ground crew and admin staff, notably Wg Cdr Guy Gibson V.C DSO DFC whose signature is direct centre over the water rushing through the breach in the dam. 105cm h x 105cm w (89.5cm h x 89.5cm w unframed)

24 **Alfred Egerton Cooper R.B.A. (British, 1883-1974) The Firth of Forth with the British Fleet from HMA 9 Airship, oil on canvas, circa 1916, signed recto, Bourlet labels verso, 69cm h x 89cm w, within a painted wood frame. ** Artist's Re-sale Rights may be payable on this lot. Provenance: Sir Barnes Wallis thence by descent. Exhibited: possibly "Airships in Peace and War" Prince's Gallery, Knightsbridge, September 1919. Note: The R.9 was the first airship on which Barnes Wallis worked, serving as an assistant at Vickers under Chief Designer H. B. Pratt, and was the first British rigid airship to fly. Alfred Egerton Cooper and Wallis were close friends from their time together in the Artists Rifles, a connection that lends particular resonance to this work. This painting may be among the earliest works executed in flight, or developed from sketches made in the air, and was very likely painted during the same flight as the photograph "An aerial view of a portion of the Grand Fleet at anchor in the Firth of Forth, taken from the British Airship R.9" (Imperial War Museum, cat. no. Q 20633). The painting is prominently displayed on the wall of Barnes Wallis's office in the 1955 film "The Dam Busters", widely regarded as one of the best-known and most beloved British war films of the post-Second World War era.

140 A 2 inch aluminium sphere of the type used in the Teddington ship tanks during the development of the Golf Mine "bouncing bomb". Discovered in a box of Sir Barnes Wallis' lectures slides on the "Dam Busters" raid, the spheres were the next evolutionary step after the garden marbles leading eventually to the development of the Highball and Upkeep bombs. Between 9 June and 10 September 1942, Wallis made use of one of the two large indoor water tanks of The National Physical Laboratory at Teddington on at least 18 occasions, he stated "I moored a wax model of a battleship several hundred feet up the tank, broadside on. We fired 2in diameter balls at it, when of course after hitting the freeboard of the ship, the sinking velocity of the ball combined with back-spin to move it towards the ship, and by adjusting the mean density of the ball we were able to pass it right underneath "the soft underbelly", to quote Winston Churchill.

151 A Commander Of The Most Excellent Order of The British Empire, Civil Division silver gilt neck badge, 2nd Type, with original ribbon, by Garrard and Co Ltd, awarded to Sir Barnes Wallis in 1943, contained in original black fitted case with gilt lettering.

260 Sir Barnes Wallis, a Knight Bachelor's second type silver gilt neck badge with Royal Mint Hallmark in fitted red case (Wallis was knighted on December 10th 1968), together with a red cloth bound volume listing Knight Batchelor recipients from 1965-1973, 8vo, 193pp. and a Guardian Newspaper from June 8th 1968 announcing the Birthday Honours list.

43 **Alfred Egerton Cooper R.B.A. (British, 1883-1974) "Putting on the outer fabric covering of the R100 in the shed at Howden", oil on canvas, signed and dated 1928 recto, additionally signed and dated 1928 with Bourlet label verso, 64cm x 77cm, within a painted wood frame. 76cm x 88cm. ** Artist's Re-sale Rights may be payable on this lot Provenance: Sir Barnes Wallis thence by descent. Note: The painting was reproduced in full colour in The Sphere, 28 September 1929, p. 26. It is prominently displayed on the wall of Barnes Wallis's office in the 1955 film "The Dam Busters", widely regarded as one of the best-known and most beloved British war films of the post-Second World War era, and appears in several publicity photographs of Barnes Wallis, including Roger George Clark's portrait of Sir Barnes Wallis at his desk, now in the collection of the National Portrait Gallery

1 **Alfred Egerton Cooper R.B.A. (British, 1883-1974) Half Length Portrait of Barnes Wallis in Army Uniform smoking a Pipe, oil on canvas, signed with initials, 32cm h x 23cm w. Provenance: Sir Barnes Wallis thence by descent. Note: this work was most likely painted in 1915, while Cooper and Wallis were serving in the Artist Rifles. ** Artist's Re-sale Rights may be payable on this lot

314 A grey Simplon draughting table/desk, c.1960s, fitted with a Mavitta Master 360 draughting machine with Admell Fingalite adjustable lamp. The tapered triangular cast-iron base was manufactured by Dargue Brothers at Simplon Works, Halifax, and features a central red Simplon logo, pedals, and rubber footrests. The base supporting a pine table top with attached draughting machine. Together with a revolving steel high chair by ROC Birmingham

288 A collection of Barnes Wallis' lecture slides mainly about Dam Busters, bombs and targets in fitted numbered wooden boxes (81 slides in two boxes) Box W, 40 slides (5 slides cracked), box marked in chalk into four sections Section A: Four miscellaneous diagrams, one miscellaneous photo, two photos of original, almost spherical bouncing bomb Section B: Five photos, five drawings and a map relating to the Ruhr dams and the Dam Busters Section C: 14 photos of 617 Squadron's targets, some destroyed (including Tirpitz upside-down), a photo of a Tallboy bomb and two drawings relating to the Tallboy Section D: Five photos relating to the Ruhr dams and the bouncing bomb Box D, Diagrams, 41 slides Slides 1-26 Aerodynamics Slides 28-31 Stratospheric chamber Slides 33-34 Diagram, photo and blueprint of a German dam, possibly Mohne Slides 36-38 Diagrams of Tallboy effect on Bielefeld viaduct Slides 40-45 Diagrams for bombing coal mines, oil storage depots, tunnels, railway cutting or embankment

49 **Alfred Egerton Cooper R.B.A. (British, 1883-1974), HMA 9 Airship in Flight over Norfolk, oil on canvas, signed and dated 1917 recto, Bourlet label verso, 61cm h x 91cm w, within a painted wood frame 72cm x 103cm. ** Artist's Re-sale Rights may be payable on this lot Provenance: Sir Barnes Wallis thence by descent. Exhibited: possibly "Airships in Peace and War" Prince's Gallery, Knightsbridge, September 1919. The No 9 was the first airship Barnes Wallis worked on as an assistant at Vickers with Chief Designer H B Pratt and the first British airship to fly. A E Cooper and Barnes Wallis were close friends and Cooper is thought to have gifted the picture to Wallis. The painting likely depicts flight over Norfolk as the Airship was stationed from October 17th 1917 at Royal Naval Air Service Station Pulham (later RAF Pulham). The painting is clearly visible in many publicity photographs of Wallis in his office.

216 A yellow painted wooden model of the Wild Goose, raised on a wooden base with metal plaque stamped "1949-1954 Wild Goose, Wing-Controlled Aerodyne, 1/16 Scale Model Trials Aircraft" 15cm h x 47cm w x 35cm d. Wild Goose was a late forties research project into tailless variable-sweep aircraft using a unmanned aerial vehicle (UAV). It was developed to explore the advantages of variable-geometry or swing-wing aircraft and eventually evolved into the Swallow.

135 A wooden adjustable catapult designed for and used in the 1955 movie "The Dam Busters" by Michael Redgrave (playing Sir Barnes Wallis). The catapult represents that used by Wallis in his 1941 April Bank holiday garden marble experiments, to prototype the concept of the bouncing bomb. The catapult raised on triform base and mounted on metal collar with tripod supports. The catapult firing rail adjustable in angle by a wing nut, having a projectile receptacle attached to elastic cord running along the top rail of the device. The rail fitted a trigger to release the projectile. 138cm h, catapult rail 93cm l

129 A polished chrome model of a Vickers Wellington Bomber in flight with rotating propellers, on a shaped black acrylic base, visible on Sir Barnes Wallis' desk in public photos 16cm h x 20cm w x 26cm d

221 A Faber-Castell Darmstadt 1/54 slide rule circa 1952, complete with fitted leather case, hand painted initials B.N.W to case

226 Barnes Wallis' personal copy of "The Dam Busters" 1955 film, cased in three and a half reels of 35mm film, mounted on Tuscan Reels in original Pathe plastic film cases

152 A wooden model of Tallboy (Medium) Bomb 32cm, raised on a mahogany stand with brass plaque marked Tallboy (Medium) 12,000 LB. 1/20 scale. The Tallboy was the first bomb Wallis designed after the success of the bouncing bomb. The bomb was so large, there were no aircraft capable of lifting it to its optimal altitude but it could be dropped from a lower height and would enter the earth at near supersonic speed, penetrating to a depth of up to 20m before exploding. The Tallboy was used on strategic German targets such as V-2 rocket launch sites, the V-3 supergun bunker, submarine pens and the battleship Tirpitz, as well as large civil constructions such as viaducts and bridges

149 Barnes Wallis' facsimile copy of the 617 Squadron Grant of Arms granted in March 1944. The badge symbolises the successful attack on the dams in May 1943 with the lightning flashes symbolising the three dams attacked. The French motto "Apres Moi Le Deluge" translating as "After me the flood". The paper is creased and stained and framed in a contemporary 1940's perspex frame with green border 18cm h x 15cm w

52 A chrome desk model/paperweight of an R.100 airship 20cm l x 4cm w, together with 2 volumes of Aircraft Engineering, February 1930 and June 1930, both with Department of Aeronautical Research & Development British Aircraft Corporation Ltd, Weybridge Division stamp to the front.

227 Barnes Wallis' personal copy of "The Dam Busters" 1955 film lobby poster in British half sheet format (22 inches x 27 inches), on blue card depicting Richard Todd as Wing Commander Guy Gibson VC DSO DFC with red Dam Buster title