[Ads-l] Antedating of "yo" (greeting)

[James Landau]

I recall seeing "yo" used as a greeting in at least one of the 87th Precinct stories by Ed McBain (pseud. for Evan Hunter).  I can't locate the one I remember, but Google Books gives a 1959 occurrence (and yes I know the problems with dating snippet views in Google Books).
https://www.google.com/books/edition/Til_Death/BVtRAQAAMAAJ?hl=en&gbpv=1&bsq=yo%2Bed+mcbain&dq=yo%2Bed+mcbain&printsec=frontcover
James Landau
jjjrlandau at netscape.com

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