The Turpin family were in Harberton for many many generations.
By chance I had this with 96 other Pomeroy records from A2A ..it may be the only one but you could try looking.
Devon Record Office 3799M-0/ET/13/4
1435Contents: Lease for three lives
1. Edward of la POMEROY esq.
2. John Turpyn the elder son of John Turpyn of Harberton, Johane his wife and John their son
Premises: one messuage and all 1.'s lands with the houses, closes and appurtenances in Harberton and one cottage with garden adjacent at le Torre which John Mey and Ammia his wife formerly held from 1.
Rent: 13/4d. 2. have to keep all the property in a good state of repair, excepting one house called le Oldehalle which is now totally ruinous
Witnesses: Henry Bere, William Pyper, John Adam, John Turpyn, John Hore
Date: Harberton, Wednesday, the feast of the Innocents, 14 Henry VI
Seal: small, round, lion's head with initials E.P.
and also
http://www.devonheritage.org/Places/Harberton/HarbertonProtestationReturn.htm1641
Crispin Turpin , Crispin Turpin, Hugh Turpin, Nathaniel Turpin, Richard Turpin, Thomas Turpin,Walter Turpin
and later 1723
http://www.foda.org.uk/oaths/QS17/2/1/7b.htmBenjamin Turpin of Harberton [Marked] made his x in the Devon and Exeter Oath Rolls