175 years ago today - Jul 12, 1843, Wednesday

[William Clayton]
On the morning of the 12th of July, 1843, Joseph and Hyrum Smith came into the office in the upper story of the `brick store,' on the bank of the Mississippi River. They were talking on the subject of plural marriage. Hyrum said to Joseph, ``If you will write the revelation on celestial marriage, I will take it to Emma, and I believe I can convince her of its truth, and you will hereafter have peace.'' Joseph smiled and remarked, ``You do not know Emma as well as I do.'' Hyrum repeated his opinion and further remarked, ``The doctrine is so plain, I can convince any reasonable man or woman of its truth, purity or heavenly origin,'' or words to their effect. Joseph then said, ``Well, I will write the revelation and we will see.'' He then requested me to get paper and prepare to write. Hyrum very urgently requested Joseph to write the revelation by means of the Urim and Thummim, but Joseph, in reply, said he did not need to, for he knew the revelation perfectly from beginning to end. ...

Hyrum then took the revelation to read to Emma. Joseph remained with me in the office until Hyrum returned. When he came back, Joseph asked him how he had succeeded. Hyrum replied that he had never received a more severe talking to in his life, that Emma was very bitter and full of resentment and anger.

Joseph quietly remarked, ``I told you you did not know Emma as well as I did'' ... [additional copies of the revelation are made] ... Two or three days after the revelation was written Joseph related to me and several others that Emma has so teased, and urgently entreated him for the privilege of destroying it, that he became so weary of her teasing, and to get rid of her annoyance, he told her she might destroy it and she had done so, but he had consented to her wish in this matter to pacify her, realizing that he knew the revelation perfectly, and could rewrite it at any time if necessary. ...

After the revelation on celestial marriage was written, Joseph continued his instructions, privately, on the doctrine, to myself and others, and during the last year of his life we were scarcely ever together, alone, but he was talking on the subject, and explaining that doctrine and principles connected with it. He appeared to enjoy great liberty and freedom in his teachings, and also to find great relief in having a few to whom he could unbosom his feelings on that great and glorious subject.

[Source: Fillerup, Robert C., compiler; William Clayton Nauvoo Diaries and Personal Writings, A chronological compilation of the personal writings of William Clayton while he was a resident of Nauvoo, Illinois. http://www.boap.org/LDS/Early-Saints/clayton-diaries]