Maggie ... has anyone done a field name study in your area ? We've done one here in and around this village, and names do give you clues about past owners, uses, etc. of fields ... like, for e.g. if the fields near 'your' cottage were called something like Castle Field or Church Field or other descriptive name, then you have some useful info to work on. We have two little fields near here called Castle Edwards, and Little Castle Edwards ... and lo and behold, I found the remains of a motte there ! Without discovering the name, I'd never have thought to see what was there !
Near the school where I used to work was a field called Burnt Field ... and in a dry year, it was possible to see why ... two lines in the stubble marking the street, of a little hamlet that had been sacked by Owain Glyndwr and burned to the ground. A little archaeological digging proved it, with sherds of med. pottery turning up along the old and long disappeared street.
I'm very keen on field names !