1805 – Born in Holyoke, Massachusetts.
– He was educated at Amherst College and Andover Theological Seminary.
– He was sent to Persia by the American Board of Missions, and ran a mission at Urmia, now capital of the West Azarbaijan Province of Iran.
1835 – The mission started with Perkins, Asahel Grant and their respective wives Charlotte and Judith.
1834 – He undertook a mission to Persia which lasted 35 years, with some returns to the USA, and was responsible for the literary form of Assyrian Neo-Aramaic, a Semitic language spoken in parts of contemporary Iran and Iraq, into which he translated the Bible.
1843 – Mar Yohannan visited the USA with Perkins.
– He described his experiences in A Residence of Eight Years in Persia among the Nestorian Christians with Notices of the Muhammedans and Missionary Life in Persia.
1869 – Died in Chicopee, Massachusetts.