1 The sovereign weed betwixt two marbles plain
sovereign > supremely efficacious marbles plain > [smooth slabs of marble]
2 She pounded small, and did in pieces bruise,
bruise > crush, grind down
3 And then, atween her lily hands twain,
atween > between lily hands > (Cf. Liagore at 304.41:1, who is also versed in "leaches craft") twain > two
4 Into his wound the juice thereof did scruze,
scruze > squeeze
5 And round about, as she could well it use,
as she could well it use > [as well as she could]