Samuel Munson (born 1804) and his fellow companion Henry Lyman (born 1809) were early American missionaries to Sumatra. In their first year, they were killed by Batak tribesmen in 1834.

I have been asked more than once if I am related to Samuel Munson since I am a missionary in Southeast Asia and have the same last name. Despite this, it is unlikely that I am related to him. My great grandfather changed his name from Gadd to Munson when he moved to the United States in the 1880s.

<The Wikipedia articles for Lyman and Munson say that they are American Baptist missionaries. However, they were sent out by the ABCFM. Both attended Andover Seminary. ABCFM despite being non-denominational did not support Baptists. Andover is a Congregationalist seminary. It seems as if the Wikipedia articles for the two missionaries referring to them as Baptists stem from a book, “Hard Bargaining in Sumatra: Western Travelers and Toba Bataks in the Marketplace of Souvenirs” by Andrew Causey.>

Anyway, here is a quote of an early biographer of the two men. At the end of the book, the writer is encouraging Christians to be faithful to the missional task and not be dissuaded by the martyrdom of these two men of God.

“Of all who have gone from this country to preach the gospel among the heathen, Munson and Lyman only have been removed by violence. At the time of this appalling occurrence, candidates for missionary service, the patrons of the cause and those who managed its concerns were confessedly in great danger of yielding to human instruments a portion of that confidence which is due exclusively to him who “worketh all in all.” Cheering success has crowned our efforts to evangelize the nations, and multitudes supposed that the work would go smoothly on if a given amount of money could be raised and the requisite number of men sent forth. Knowing that mild expedients would not suffice to check a growing self-complacency among his people, a jealous God sent this sharp rebuke to admonish them of their entire dependence on Him. “Cease ye from man.” — “The race is not to the swift, nor the battle to the strong.” — “The Lord alone shall be exalted in that day.”

Such events as that now under review, need not fill the heart of any believer with anxious forebodings. The promises are yea and amen, in Christ Jesus. “Glorious things are spoken of Zion. God is in the midst of her. He will help her and that right early.”

If far greater sacrifices and disappointments await the church, still let her show that she “abates not a jot of heart or hope, but presses right onward” in the footsteps of her gracious and immutable Saviour.

Memoirs of the Rev. Samuel Munson and the Rev. Henry Lyman, Late Missionaries to the Indian Archpelago with the Journal of Their Exploring Tour. By Rev. William Thompson. (New York: D. Appleton & Company, 1839), 195-196.
https://archive.org/details/memoirsofrevsamu00muns/page/196/mode/2up