Oliver B. Huntington provides account of garments at martyrdom.
Oliver B. Huntington, "History of the life of Oliver B. Huntington; 1878-1900," Church History Library
My niece Zina Card and sister Lucy B. Young came on their return from Goshen and the other settlements in this county south of here and stayed all night with us . . Among other things both new and old was repeated the fact that the Prophet Joseph pulled off his garments just before starting to Carthage to be slain and he advised Hyrum and John Taylor to do the same, which they did; and Brother Taylor told Brother Willard Richards what they had done and advised him to take off his also, but Brother Richards said that he would not take his off, and did not; and he was not harmed. Joseph said before taking his garments off, that he was going to be killed. . . "was going as a lamb to the slaughter" and he did not want his garments to be exposed to the sneers and jeers of his enemies. These facts all came from President John Taylor's lips after he was President of the Church. Elder John Morgan had told them to me as stated to him by Brother Taylor. Sister Lucy B, Young said that Brother John Taylor told her in answer to direct questions, the same all except with regard to Willard Richards.