Colour-washed Indian ink drawing on paper showing the RH side elevation of a Timothy Hackworth-designed Stockton & Darlington Railway 0-6-0 double tender steam locomotive. Locomotive is unidentified on the front of the original drawing but the name 'Magnet' has been lightly pencilled in on the boiler side. The back is marked 'Locomotive No. 24 'Magnet.' Almost certainly drawn by Thomas McNay.