mint-drop

So now sit up like a man, and take the cup in one hand, and this little mint-drop in the other; drink off the nasty stuff in a moment, and pop the mint-drop into your mouth at once; you will never feel the taste of the medicine after that. '

Aunt Mary Mrs. Perring

Then he understood why the young ladies smiled and nodded acceptance so pleasantly that morning, for, unconsciously, he had been "popping the question" all round; although inquired into at the time, the mystery of the mint-drop was never satisfactorily solved.

From John O'Groats to Land's End Robert Naylor

As he was advancing with them up the centre of the church his eye chanced to rest for a moment on the contents of his plate, and there, to his horror, he saw a large white mint-drop about the size of a half-crown, which had been placed face upwards bearing the words printed in clear red letters, "WILL YOU MARRY ME?"

From John O'Groats to Land's End Robert Naylor