IMPORTANT FROM SALT LAKE CITY.—San Francisco papers have the following in-telligence :
"By private letters, received from Salt Lake, Mr. Thompson learned that the schism in the Mormon Church has assumed a form-idable character. The Gladdenites, or apos-tates, from the Simon-pure faith as enunci-ated by Brigham and his adherents, have of late wonderfully increased their numbers, and grown so rebellious that the Prophet is forced to environ himself with a trusty guard of the faithful. The letters state that his house is guarded night and day by his friends, and that, so bitter are his enemies against him, he is afraid to show himself in public. He has deserted the Tabernacle. Mr. Thompson does not "confirm the rumor of his flight."