The granting of a charter to the Royal College of Surgeons in Ireland in 1784 replaced the original charter of barbers and surgeons, enabling the college to promote and advance surgery in Ireland.
According to Cameron in his History of RCSI, Dease contributed liberally towards the expenses incurred in procuring the College Charter.
[2] Dease published treatises on head injuries, midwifery and the radical cure of hydrocele.
He set up in practice in Dublin, and gained repute as a surgeon, holding hospital appointments.
[3] Dease had a good practice, and married Eliza, daughter of Sir Richard Dowdall.