Background
He was son of Anthony Carsaye or Kersey and Alice Fenimore, and was baptised at Bodicote, near Banbury, Oxfordshire, on 23 November 1616.
He was son of Anthony Carsaye or Kersey and Alice Fenimore, and was baptised at Bodicote, near Banbury, Oxfordshire, on 23 November 1616.
He came to London, and gained a livelihood as a teacher. At first (1650) he lived at the corner house (opposite to the White Lion) in Charles Street, near the piazza in Covent Garden, but afterwards moved to Chandos Street, Saint Martin"s Lane. Kersey obtained a wide reputation as a teacher of mathematics.
At one time he was tutor to the sons of Sir Alexander Denton of Hillesden House, Buckinghamshire.
They were both future public figures (Sir Edmund Denton, 1st Baronet as a Member of Parliament for Buckingham, as his father had been, and Alexander Denton as a judge, as well as Member of Parliament for Buckingham after Edmund).