[citation needed] Clark was born on February 25, 1830, in North East, New York, and baptized into the Baptist faith at age 14.
He attended Worcester Academy from 1839 to 1841, earned his master's degree from Brown University in 1857, and was ordained a preacher in 1859.
[7] On receiving permission, he moved to Molungkimong in March 1876 (an Ao Naga village in the Mokokchung district of Nagaland) and lived there until October 24, 1876.
"Adherents of the old, cruel faith were quick to see that the gospel of peace and love would rapidly empty their skull houses and put to rout most of the old customs handed down from forefathers, for whom they held the greatest reverence.
"[13] Christianity brought an end to the practice of headhunting and destroyed most of the traditional culture and oral knowledge of the various Naga tribes.