A set of four late 18th century Irish silver hunting buttons

A set of four late 18th century Irish silver hunting buttons, marked with a harp and Hibernia and incuse marked I.S, circular form, engraved with a hare and 'Donn Hunt', plus a matching button with maker's mark only P.M, and a Scottish silver hunt button, maker's mark of J. McKay, Edinburgh circa 1815, engraved with a fox, the initial 'H' and 'Fife'. (6)