Do not I love Thee, O my Lord? P. Doddridge. [St. Peter's love of Christ.] This hymn is not in the D. MSS. It was first published in J. Orton's posthumous edition of Doddridge's Hymns, &c, 1755, No. 246, in 7 stanzas of 4 lines and headed, “Appeal to Christ for the sincerity of Love to Him." It is based on St. Peter's answer to Christ, "Lord, Thou knowest all things, Thou knowest that I love Thee." In 1839 it was repeated in J. D. Humphreys's edition of Doddridge's Hymns, &c. Its use in America is extensive.
--John Julian, Dictionary of Hymnology (1907)