Alexander Dyce, A General Glossary to Shakespeare's Works

commences “it, and sets it in act and use—Till sack,” 2 HENRY IV., iv. 3. 114. “It seems probable to me, that Shakespeare, in these words, alludes to the Cambridge Commencement; and in what follows to the Oxford Act: for by those different names our two universities have long distinguished the season at which each of them gives to her respective students a complete authority to use those hoards of learning which have entitled them to their several degrees in arts, law, physic, and divinity” (TYRWHITT) .