1878. Bogie Trucks for Railway Locomotives, &c.: [...] Fig. 1 is a cross section and Fig. 2 a section plan of a bogie. A curved casting a is fixed to the engine and a wrought-iron beam or beams b are connected to the bogie frames by links c fitted with or without springs d.
1883 April 13, “Abstracts of Specifications Published during the Week Ending November 24, 1883”, in W[illiam] H[enry] Maw, J[ames] Dredge [Jr.], editors, Engineering: An Illustrated Weekly Journal, volume XXXVI, London: Offices for advertisements and publication, 35 & 36, Bedford Street, Strand, W.C., published 30 November 1883, page 507, column 2