An express recently arrival at Leavenworth from the Utah oxj*«dition, brings information that the whole force, with the exception of Col. Cook » command, h concentrate at Ulack's Fork, and were moving towards Fort Bridger; progress very slow, sometime* making only two or three mils- aJay. The an in mis were giving out hourly, and it was thought all would iterbdi this winter. The supply trains are all with the mili-tarv, and provision* abundant.The report that two companies of infantrv met with reverses en route to Utah, is without foundation. Five oowioanies of C«4. Sumners raiment, cavalry, have recently I taken winter Quarter!* at Fort Kilev.