Green’s Dictionary of Slang

poundage cove n.

[SE poundage, ‘an impost, duty, or tax of so much per pound sterling on merchandise’ (OED) + cove n. (1)]

[mid-19C] (UK Und.) ‘a fellow who receives poundage for procuring customers for damaged goods’ (Kent, Modern Flash Dict., 1835); the share of a prostitute’s fee which is given to the madam of a brothel.