Henry Martyn (February 18, 1781 - October 16, 1812), was an English Protestant Christian missionary to the Islamic peoples of India and Persia. Wikipedia
The definitive Wikipedia entry for Henry Martyn. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Henry_Martyn
Journals and Letters of the Rev. Henry Martyn, B.D. Late Fellow of St. John's College, Cambridge; and Chaplain to the Honourable East India Company. justus.anglican.org/resources/pc/india/martyn/journal.html