Note 349 — ACTUS I, SCÆNA 1.
Reading edition
i.e., Subtleties. So in "Every Woman in her Humour," 1609, sig. H 4: "He has his pols and his œdypols, his times and his tricks, his quirks, and his quilits," &c.
Again, in Lyly's "Euphues," 1581, p. 56: "Not only the, quirks and quiddities of the Logicians, but also," &c.
See also Mr Steevens's note on "Hamlet," act v. sc. I.