Abraham H. Cannon records his father George Q. Cannon saying he made the oath of vengeance in the Nauvoo endowment.

Dec 6, 1889
Personal Journal / Diary
Abraham H. Cannon
Scribed Paraphrase
2nd Hand

Abraham H. Cannon, Journal, December 6, 1889, 205–206, Vault MSS 62, Vol. 11, Box 2, fd. 1, Brigham Young University, HBLL, L. Tom Perry Special Collections

Abraham H. Cannon
Abraham H. Cannon, George Q. Cannon, Thomas J. Anderson, Joseph F. Smith

In speaking of the recent examination before Judge Anderson Father said that he understood when he had his endowments in Nauvoo that he took an oath against the murderers of the Prophet Joseph as well as other prophets, and if he had ever met any of those who had taken a hand in that massacre he would undoubtedly have attempted to avenge the blood of the martyrs. The Prophet charged Stephen Markham to avenge his blood should he be slain: after the Prophet's death Bro. Markham attempted to tell this to an assembly of the Saints, but Willard Richards pulled him down from the stand, as he feared the effect on the enraged people. — Bro. Joseph F. Smith was traveling some years ago near Carthage when he met a man who said he had just arrived five minutes too late to see the Smiths killed. Instantly a dark cloud seemed to overshadow Bro. Smith and he asked how this man looked upon the deed. Bro. S. was oppressed by a most horrible feeling as he waited for a reply. After a brief pause the man answered, "Just as I have always looked upon it—that it was a d–d cold blooded murder." The cloud immediately lifted from Bro. Smith and he found that he had his open pocket knife grasped in his hand in his pocket, and he believes that had this man given his approval to that murder of the prophets he would have immediately stuck him to the heart.

Citations in Mormonr Qnas
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