Percy Bate, « Historic English Drinking Glasses »,  The Studio an Illustrated Magazine of Fine & Applied Art, , Londres,  octobre 1901, p. 106.

Man is a collecting animal, a distinction which he shares with the magpie, the squirrel, and the caddis worm. But while the two latter would not seem to collect for the sake of the pleasure afforded them, but rather for the benefit accruing in the way of food or protection, the magpie certainly does gather together its miscellaneous hoard from sheer delight in its possession.