Early years He is known to have been practising in the Irish
courts of common law by 1477. In 1478 he went to England and received a
royal pardon for an unspecified offence. He probably owed this appointment to the influence of Gerald FitzGerald, the "Great Earl of Kildare", who was then beginning his effective control of the Irish Government, which he dominated with short intervals for 35 years. In about 1481 Estrete was entrusted with the management of the
customs duties for the Port of
Drogheda. In 1483 a
statute of the
Irish Parliament gave him first charge over any payment out of the revenues from the
cocket (the official
custom house seal) and customs of Dublin. In 1480 a John Estrete (he is referred to as "John Estrete senior", so this was most likely the judge's father rather than the judge himself) bought land in County Meath from Simon Walshe and his wife Juliana. Estrete also taught them
Law French (the official language of the law courts until the seventeenth century), and Darcy was still writing it fluently fifty years later. This episode probably established Estrete's role as an intermediary between Kildare and the English Crown. The King's letter of instructions to Estrete, which was to be shown to Kildare, survives. ==Lambert Simnel==