Jedediah M. Grant explains Sidney Rigdon's return to church activity in spring 1844.
Jedediah M. Grant, A Collection of Facts, Relative to the Course Taken by Elder Sidney Rigdon (Philadelphia: Brown, Bicking and Guilbert, 1844), p. 16
Last Spring, Elder W. W. Phelps, prevailed on Elder Rigdon, to go with him and attend the councils of Elder J. Smith, he went, and after listening to the instructions and viewing the order of the council, and the manifestations of the power of God through Elder J. Smith, he leaped for joy, and walked the room as sprightly as a boy in his gayest frolics. Exclaiming, “Joseph! Joseph! Thou servant of the most High God, I will never leave nor forsake thee,” for mine eyes now see what Kings and Prophets desire to see and hear. But they fell asleep to rest in hope of what mine ears hear and mine eyes see. Brother Joseph you have tried to shake me off for several years, but you cannot do it, I will hold on to the skirts of your garment, I am now determined never to let you go.” His visits to the councils revived him up so much, that he spoke at the April Conference, several times, with considerable spirit and energy.