Barret 13.7.1800 calls (in Ireland) / 7.8.1807 Barret, constable at Skinner Street (Godwin's) / 6.10.1809 write to Barret / 24.1.1810 write to Barrat / 4.4.1810 again / 5.12.1810 again / 15.7.1811 again / 5.8.1813 Barrets call / 21.9.1828 Jos. Barret at (Joshua) Robinson's / 10.4.1829 Barret at (Joshua) Robinson's
The first entry above 1800 in Ireland was possibly John Barrett DNB 1753/4 -1821 classical scholar and eccentric. (John Barrett of the Theatre Royal, Crow St, Dublin = June 1806 miss Devereux, Aungier St, Dublin. Edward Deane Barrett attorney of Dublin = May 1811 dau of Charles Burrows).
The 1809 to 1811 write to entries were at a time Godwin was writing to many provincial booksellers so could have been Thomas Barrett bookseller, Trinity-st Cambridge (Holdens directory 1811) but more likely Joseph Barratt bookseller Bath from 1799 to 1816 (bbti & PCC will 1825)
For the last two entries: will PCC 1850 of Rev Joseph Barrett 16 Devonport St, Hyde Park