Morris has clywe; and his Glossary has 'Clywe, v. to turn or twist'; but no such verb is known. See Claw, v. § 3, in the New E. Dict.
Morris has frot; but it does not appear in the Glossary.
I do not here endorse all Ten Brink's dates. I give his scheme for what it is worth, as it is certainly deserving of consideration.
It is the stanza next following the last one quoted in vol. i. p. 23. I quote it from the Aldine edition of Chaucer, ed. Morris, i. 80.
Of course Lydgate knew the work was unfinished; so he offers a humorous excuse for its incompleteness. I may here note that Hoccleve refers to the Legend in his poem entitled the Letter of Cupid, where Cupid is made to speak of 'my Legende of Martres'; see Hoccleve's Works, ed. Furnivall, p. 85, l. 316.