When ordained deacon, 15 April 1584, noted as Schoolmaster at East Tilbury and Constituted to serve cure of souls, East Tilbury. [Brett Usher identifies him as doubtless son of Thomas Walker, Marian exile and on return Rector of Chadwell (close to E Tilbury): this would explain why he was born in Frankfurt]
| Year | Type | Name as Recorded | Location | Office/Status | Full Record |
|---|---|---|---|---|---|
| 1584 | Appt(Licensing) | Walker, Isaac | Leigh / | Schoolmaster | View |
| 1584 | Appt(Licensing) | Walker, Isaac | London diocese / | Schoolmaster | View |
| 1584 | Ordi(ordination) | Walker, Isaacus | / | priest | View |
| 1584 | Ordi(ordination) | Walker, Isaacus | / | deacon | View |