I found this marvellous book from 1892 in the Westcountry Studies Library [now Devon Archives and Local Studies]:
SUBURBS OF EXETER
With general particulars as to the Landowners,
Lay and Clerical, from the Conquest to the present time,
and a special notice of the Hamlyn Family.
“A Digression” on the Noble Houses of Redvers,
and of Courtenay, Earls of Devon.
Charles Worthy, Esq
(Formerly HM 82nd Regt)
Sometime Prin Assist to the late Somerset Herald,
“Devonshire Parishes,” “Practical Heraldry,” &c
There’s a chapter on Heavitree Parish, which covered much of the area I’m interested in. St Clare’s Chapel, Livery Dole, is slightly outside my area, but still interesting. Today I found out that it is not dedicated to St Clare at all, but to St Clarus martyr.
And now I see the book has been digitised by Google, which is helpful, but not at all like reading the real thing.