Thomas B. Marsh reports that Oliver Cowdery told David W. Patten he queried Joseph if he was guilty of adultery "with a certain girl" (Fanny Alger).
Minutes, 12 April 1838, 124, The Joseph Smith Papers website, accessed May 23, 2024
Thomas B. Marsh testifies that while in Kirtland last summer, David W. Patten asked Oliver Cowdery if he Joseph Smith jr had confessed to his wife that he was guilty of adultery with a certain girl, when Oliver Cowdery cocked up his eye very knowingly and hesitated to answer the question, saying he did not know as he was bound to answer the question yet conveyed the idea that it was true. Last fall after Oliver came to this place he heard a conversation take place between Joseph Smith and Oliver Cowdery when J. Smith asked him if he had ever confessed to him that he was guilty of adultery, when after a considerable winking &c. he said no. Joseph then <asked> him if he ever told him that he confessed to any body, when he answered no.
Joseph Smith jr testifies that Oliver Cowdery had been his bosom friend, therefore he intrusted him with many things. He then gave a history respecting the girl buisness. Also that Ooliver Cowdery took him one side and said, that he had come to the conclusion to get property and if he could not get it one way he would another, God or no God, Devil or no Devil, property he must must have and since that he has dealt dishonest with him [Joseph], that he has taken a printing press and type from Kirtland for which he was to give up some notes which he had against Joseph Smith jr and Sidney Rigdon which he did not do, nor has to this day.