Sentence:  By the time we backed on, André was wearing back to front the B.R. engineman's cap I had given him, which was hailed with delight by the crew of a La Chapelle <WSD>Chapelon</WSD> that had drawn up alongside us and was to follow us to Paris. 
Meaning of the word marked with <WSD> tags:  A steam locomotive designed by André Chapelon.