From Pittsburg

Cairo, April 21. The steamer Mussulaiau arrived to day fiora Pittsburg Landing, haring left that place on Saturday eveuing. Shc brings no news of special importance, but ft passenger reports (hat iho TenneMCO1 lias again coinmeneed rishi" rapidly, and tliat the roads in tlie v'voiu'ity oí' Pittsburg aro in a wretehed cooiití iq by rcasou of the late fall cf rain.- Furage can only be distribuid bv beiog hung (íu tho b:in!;s of mules, and aruiy wagons are stuc'i ('ast in the mu l.í In view of the present condition of arouiid Pitfeburg, it 3 f.:ir to infer t!i:it tlio gi-eat battlü wliich bas been momeutarily expected the ïast week will not transpire in at least a week to cnmo. Our army at Pittsburg is in excellent figliting coudition. The regiment! that were so frightfally decimated at the lato OJDtest are bving re orgairz d, and tlunkj to the activity ot' üen. Halleek, every división, brigade, regiment, and company aro prepared to meet the cneniy with na unbroken front. Our scouts penétrate directly to tho cnL'iny's liues and bring back intelligettce, Beaiiregard, wlio is cbiuf n oomrnand is ictivi'ly engagod in throwing up iatresehaienota alorg tho whole . line, planting batlërffls and preparing for a pystoraatic deience. Tliis iotulligonce is deeined rcliuhle, inastnuuh :is ihu statements of scouts uro corroborated by tho.se of clese-rters. It is thoiight that the robéis will act merey n the defensive, and that the iiagressivc attack will be made by Halleok, and that, too, at an oarly day as jojsible. It is known tbat Beauregard has beöD greatly reinforced, and thut for. eed feviee of troops ure cuntinually sweHing Lis ranks.