[Engineering drawing] Plan & Section of two Sets of Pumps for Pumping Water out of Mines [1840? Ink and wash, scale 1/2" : 1'. Bears "Clark Sunderland 1840" in manuscript, and stamp of Great Western Railway Engineer's Office, Paddington and number 31051. Drawing shows Standing Set and Sinking Set. It was one of several lots entered in auction catalogue under group heading "I.K. Brunel's office drawings and sketches of machinery"]