Thanks - that's perfect.

As I went through it I was thinking I might need to look in an old dialect dictionary to see if farm might ever have been spelled
furme. Certainly there would be a variety of pronunciations, and as spelling tended to be more phonetic than standardised.....
But then I got to the end, and in the last few word you can see
seall and
Febeary, both of which have an 'a' like the one in question. So I'm quite satisfied that it will be
farme.