Background
Leland was born at Wigan, Lancashire, United Kingdom on the 18th of October, 1691. His father, after failing in business at Wigan, settled in Dublin, where he found an opening in business, and brought over his wife and three sons. John, the second, had an attack of small-pox in his sixth year, and for a year afterwards lost his memory.
Education
John Leland was educated in Dublin, Ireland (then part of the United Kingdom), and went into the ministry there.
John received his Doctor of Divinity degree from the University of Aberdeen in 1739.
Career
John Leland is remembered as the author of A view of the principal deistical writers that have appeared in England in the last and present century: with observations upon them, and some account of the answers that have been published against them: in several letters to a friend. (1754–1755) 2 volumes (London: Printed for B Dod) which went through many editions well into the 19th century. A View of the Principal Deistical Writers was first published in 1754 and subsequently expanded twice.
At least one chapter is devoted to each of the following: Peter Annet, Charles Blount, Thomas Chubb, Anthony Collins, Lord Herbert of Cherbury, Thomas Morgan, Shaftesbury, Matthew Tindal, John Toland and Thomas Woolston. Six chapters are about David Hume"s views on religion, and approximately half of the work deals with Bolingbroke.
Personality
Leland is said to have been a man of great memory and learning.
Connections
In 1731 John Leland married Ann, widow of Thomas Magnay, minister in Plunket Street. Their children died young.