"in a sieve"
allusion
Act 1,
Scene 3
Lines 8-10
First Witch
According to folklore, witches were able to sail in a sieve, a strainer with holes in the bottom. Witches could also transform their appearance. After sailing to Aleppo, this witch intends to disguise herself as a rat to sneak aboard the sailor’s ship. She’s “like a rat without a tail,” because no part of the human body corresponds to that part of a rat.
(A Witch Sailing to Aleppo in a Sieve, Charles Turner, c. 1807)