Joyce was from Bryher, Isles of Scilly.

Francis was from Tresco, Isles of Scilly.

This family is referenced from the following (September 2003):
http://www.ellis.genproxy.co.uk/d0000/g0000088.html#I1743.

At the time Francis and Joyce's marriage in 1733, Francis was noted as being from Tresco and Joyce from Bryher. (Note: Baxter research does not indicate Francis as being from Tresco).3

At the time of the baptism of Jonathan (1734), Martha (1737), Mary (1747), Francis (1750), Henry (1751) both Francis and Joyce was noted as living at Tresco.3

Note: Duff family research records Joyce's surname as “Trevallies”.3

Acknowledgements:
• Phill Deason, Isles of Scilly, Cornwall, England
• Rick Smith, Launceston Tasmania, Australia
• Duff family researchers (ex Rick Smith, Launceston, Tasmania, Australia)
• R M Baxter research (ex Reg Deason, Christchurch, New Zealand)

General references:
• International Genealogical Index (1998-2006), Parish Baptismal, Marriage and Burial records, extract Greg Campbell, 2004, 2005, 2006 & 2007, for Deason, Cornwall, England (ref – D_Doc_#101, #102 & #103)
• www.Ancestry.com, 2006, England and Wales, Birth, Marriage &Death Indexes, 1837-1983, Extract Greg Campbell, Jan 2006, for Deason, Cornwall (ref – D_Doc_#101, #102 & #103)
• www.conwalleng.com, 2005, Cornwall Parish Register index - Births & Marriages, extract Greg Campbell, Oct 2005, for Deason (ref – D_Doc_#101 & #102)
• Federation of Family History Societies & Associates, 2004, National Burial Index, Edition 2, (1813-1837), extract Greg Campbell, Dec 2004 for Deason, Cornwall (ref – D_Doc_#103)
• General Records Office, 2000 & later, Birth, Marriage & Death indexes, 1838-1983, checked by Greg Campbell on an individual basis
• Leslie Deason & Phill Deason, c1960 – 2004, Deason Family Tree, transcribed Greg Campbell, Sep 2004 (ref- D_Doc_#127)
• Rick Smith, 2005, Deason Family Tree, (ref – D_Doc_#136)
• Duff family research, 2005, Deason Family Tree, extract Jul 2005, Rick Smith for Deason, Cornwall (ref – D_Doc_#139 & #140)
• R M Baxter, 1975, Deason Family Tree, (ref – D_Doc_#149, #150 & #151)
• R M Baxter 1975, Trevallick (Trevallack) Family Tree, (ref – D_Doc_#148)
• Cornwall On-line Census Project, 2008, Cornwall Baptisms pre & post 1813, extract June 2008, Greg Campbell for Deason, Cornwall (ref-D_Doc_#212)
• Cornwall On-line Parish Clerk, Cornwall Baptisms, extract June 2008, Greg Campbell for Deason, Cornwall, 1755 to 1900 (ref-D_Doc_#224)
• Cornwall On-line Parish Clerk, Cornwall Marriages, extract June 2008, Greg Campbell for Deason, Cornwall, 1700-1904 (ref-D_Doc_#222)
• Cornwall On-line Parish Clerk, Cornwall Burials, extract June 2008, Greg Campbell for Deason, Cornwall, 1700-1904 (ref-D_Doc_#226)
• General Records Office, 2005, 1841 Census of England & Wales, extract Greg Campbell, May 2005 for Deason, Cornwall (ref - D_Doc_#100)
• Phill Deason, 2004, Correspondence