Charles-Henri Marcellis
Charles-Henri Marcellis (1798-1864) was a Belgian lawyer-turned-industrialist. He bought a foundry in Liège, and developed an engineering business with his partner V. Duval, who provided technical expertise.
See here [1] for information about the Pont Notger in Liège, a small iron arch bridge constructed in 1846 and removed in 1860.
An excellent account of Marcellis's work, with the emphasis on iron bridges, may be found in 'Cast-iron girder bridges of Belgian industrialist Charles Marcellis (1798–1864)[2]. The Boverie bridge of 1840 in Liège used un-trussed cast iron girders which were each assembled from three sections bolted together. Robert Stephenson would later use a similar construction, but with trussed girders, as used on the infamous Dee Railway Bridge. The Paper also includes the 1843 Marcellis Bridge in Ghent, which the Paper compares with Althorpe Street Bridge in London, which it credits to William Fairbairn, while an 1857 swing bridge in Antwerp does show definite influence from William Fairbairn's box girders.