Dan Jones, His Lungs Debilitated, Speaks for Seven and a Half Hours Without Ceasing as the Saints' Prayers Renew His Strength at Merthyr (1849)

Dan Jones, who had been suffering from a debilitated state of his lungs, was enabled by the prayers of the Saints to speak for seven and a half hours without cessation during his farewell meetings at the conference in Wales, reporting that the Lord renewed his strength to finish his work.

Fuller account of this event (the complete account as preserved in The Latter-day Saints' Millennial Star, Vol. 11, No. 3, p. 43):

My lungs had been so much affected by the late conference, that I could not speak above a whisper for some days, and I expected to be unable to attend the meetings; but, through the prayers of the Saints, I was enabled to speak for seven hours and a half without cessation, and my strength was renewed to finish my work.