[2] He is thought to have been apprenticed to London printer Pynson, and some historians have suggested he may have been known as Thomas Bercula previously.
Henry died in 1547, after which time Berthelet relinquished the post (succeeded by Richard Grafton), and he was granted a coat of arms in 1549.
[4] In 1545 he was appointed by the Common Council to a committee for poor-relief in the city, together with Humfrey Pakington, Stephen Kirton, Augustine Hynde, William Garrard, Thomas Bacon and others, assisting the Lord Mayor and four aldermen in the work of receiving the Hospitals (dissolved religious houses) from the King and devising ordinances for their future management.
In 1548, with regard to St Bartholomew's Hospital, in view of their painstaking work on the orders and constitutions, and their especial diligence, they (including Berthelet) were reappointed for one further year to continue their governance of the refounded institution.
Berthelet's funeral was held before 26 January 1556 and the mourners included priests, clerks and fellow craftsmen from the book trades.