Hello, just a note to let you know that someone on Ancestry.com had looked into the history of this family. Unfortunately, I don't have the link and Ancestry has changed its business model so you can't search family trees easily any more, but what I remember is that the earliest record of Sparys in Wiltshire is an Edward Spary associated with the village of Boyton in a parish register of 1572 (the registers begin in 1560s):
http://www.freereg.org.uk/cgi/SearchResults.pl?RecordType=Marriages&RecordID=1477594. Sometime during the 1700s one descendant, Uriah Spary, had moved to Hertfordshire and set up as a wheelwright (he is mentioned in other posts), but this is probably too late for your purposes. I haven't come across the specific family member you mention.
It is possible that the family name is a corruption of 'épervier' meaning spur-maker--Boyton was the site of the family home of Norman nobles, the Giffords, who ran a knightly riding school in the Middle Ages.
