Well, some are easy enough to guess ("like a hollow green" would be "like hollin green", for example), but guesswork is second-best. There are a large number of variant forms of Young Hunting / Earl Richard (and many other names), and the ballad-group is number 68 in Child's English and Scottish Popular Ballads. Most of the "Child" texts for #68 have been posted here in the past, I think, and some from other sources; none is quite what you have there.

What we need to know in order to help most usefully is where you got it. I take it that something that long must have been transcribed from a record? Perhaps it has been collated and re-written a bit by the performer who recorded it, so it would be useful to know their name.