The pictures are gone from here viewtopic.php?f=7&t=19261&p=44001&hilit=Debain#p44001
but I assume this refers to that mark "It’s actually an earlier mark, that of Debain’s grandfather, Francsois-Alphonse Debain. It was registered on 15 Jan 1847, renewed on 19 Jul 1851, and cancelled on 27 May 1864. The device — “un nacelle et deux petits hommes” [“a skiff with two little men”] - was also used in the mark of his son and successor, Alphonse-Edouard Debain in his partnership with Louis-FrÃ©dÃ©ric Flamant, working as Debain & Flamant, 1864-1880. The firm was succeeded by Flamant’s heirs as Flamant & Fils, 1880-1891."