At ~2:25, fragments of this exchange (lines 223-224) can be heard:
Gloucester: Now, good sir, what are you?Edgar: A most poor man, made tame to fortune's blows
At ~3:56, a good chunk of Oswald's dialogue (lines 249-254) is audible:
Villain, take my purse;If ever thou wilt thrive, bury my body,And give the letters which thou find'st about meTo Edmund Earl of Gloucester; seek him outUpon the English party. O, untimely death!
And at ~4:22, there's an-other exchange between Edgar and Gloucester (lines 256-259):
Edgar: I know thee well. A serviceable villain,As duteous to the vices of thy mistressAs badness would desire.Gloucester: What, is he dead?
Edgar: Sit you down, father; rest you.
I'm not sure I have the line numbers exactly right. I've noticed that sometimes they vary between editions, anyway.
According to Mark Lewisohn's The Complete Beatles Recording Sessions, this audio was taken from a BBC radio broadcast and mixed live into the song on 29 September 1967 (p. 128).