_Poniatowski Gems_ (Vol. v., pp. 30. 65.).--I thank M--N for his note,
but it does not at all afford the information I seek. My Query referred
to the _original_ sale in London of the gems. Lord Monson's collection,
to which M--N refers, was, I believe, purchased by his lordship from a
dealer who bought them at the original sale, the date of which I seek.