Hi "nebrfan"
Don't know if this helps you any;
In the authors Appendix of Professional Men & Tradesman I found under the headings these surnames only;
LEGAL - Leigh
GROCERS - Leigh
In the book itself I found these mentions of Leigh;
P.13 = ".....coming up North Street, on the same side, you had to pass through posts by the side of Oliver Leigh's grocery shop. Next to Leigh lived Aaron Smetham, an auctioneer and tailor................"
P.14 = ".....the next house was an old peaked one which was afterwards pulled down and a new one built, the first occupier being Oliver Leigh. Shattock, a plumber and glazier, Joyce, a druggist followed......."
P.15 (this whole page describes an area called the Parade, and some of the Taunton Militia characters) ".....the well known faces of the Leighs, Beadons, Liddons (etc) have all vanished............"
There was also Mr Lee and son Herbert (theatre manger and son), and Robert Newton Lee (election songs).
Hope you can find a connection somewhere there.
Les