I would recommend that you obtain a copy as often Wills can be quite informative. Gloucestershire Archives can supply for a small fee and you can get further information from the web site. Go to: http://www.gloucestershire.gov.uk/index.cfm?articleid=1348
To start I would suggest you email: archives@gloucestershire.gov.uk quote the item of interest including the reference and ask for a quote.

Best wishes
Mike