Which preposition to use with gaff

of Occurrences 4%

Capitan Tiago finally gave in, remembering that medical students get on intimate terms with corpses, and for some time he had been seeking a poison to put on the gaffs of his game-cocks, the best he had been able to secure thus far being the blood of a Chinaman who had died of syphilis.

in Occurrences 2%

"The fellow has the modesty to carry a naked gaff in our presence," said Bignall, pointing out the circumstance to his companion, as an augury favourable to their success.

without Occurrences 1%

Trusty as steel, stands the gaff without whining, backs his friends to the limit, and plays the game out till the last card's dealt and the last trick lost.

Which preposition to use with  gaff