"Money talks" in 1666? I believe the first OED citation is 1903, by O.
Henry. The first title I found on Worldcat is D. W. McClung's _MONEY TALKS:
Some of the things it says when it speaks_ (1894)--somewhat after my 1886
cite. A 1902 song by J. Fred Helf is "If money talks, it ain't on speaking
terms with me." Many other titles followed.
"Money talks" is also in Brewer's Dictionary of Phrase and Fable, but I
don't know if it appeared in the first edition.
HAMILTON: Just asking, but how come your Belgian Frank with Albert II
doesn't say anything?