"...Lieutenant Bowie, of gun-boat No. 23, an intelligent and experienced officer, who had seen much gun-boat service at the sieges of Flushing, Cadiz, Tarifa, and Tarragona, having with him two gun-boats and four light transports, ... * Bowie is still a Lieutenant! Pity he did not serve in Syria or China. He might then have been a Captain, and mayhap a K.C.B."
I have seen a listing of gun-boats, I will keep looking.