Beren and Lúthien - Changes needed

[Findegil]

Angrist looks like an easy task:

Then Beren did Curufin release; [3340]
but took his horse and coat of mail,
and took his knifeBL-EX-10.6<QS36 , Agrist,>{there }gleaming pale,
hanging sheathless, wrought of steel.
No flesh could leeches ever heal {3055}
that point had pierced; for long ago [3345]
BL-EX-10.7<QS36 Telchar>{the dwarves} had made it, singing slow
enchantments, where {their}his hammer{s} fell
in Nogrod ringing like a bell.

About Curufin and Celegrom and who of the brethern proposed to marriage Lúthien: Curufin had already a son, so he could not propse the marriage, but I never have read the Lay in that seens. Could you give us a quotation were that is stated?

Respectfuly
Findegil