Important Balloon Reconnoissance At Yorktown

Ttie correspondent ot' the Philadelpliiu lnquirtr writiug iroui near Yoiktown April Gth, eays : The most important feature of the day has been the balloou asconsioa, wliich, in point of importando to the Govornment, has beon one of tlio grandost builoon recomioisaanues, ever made. The finst ascensión was in ide at five o'clock in the morning, and then and there the position and strength of the enerny wero ascertainod ior the tirst time. Subtequentry reconnoissances of fronrs ono to two liours were made and important inlonnation gained. The fortifioationa of the rebels are of tlia stronguüt possible oharauter, and svveep an extont oi country of seven miles, oxtending ncross tho Peninsula from the York to tho James rivers. Bebibd these tortifioatiooa they have a large reserve forcé, so that the entire etrength of tho rebolu at this point is ratea irom twonty five to thirty thoufrand men, Their forta aro mouoted by guns of the heavicpt calibre, and sorna of thern ara oi a contintious churactor for miles, being oonireciad by earthworks. The heaviest cli;iin oí' forta aro on tho west, although thowo on the north - the point from which tho (ring was first coinmonced on Saturday - are sufficiently formidable to resist a powerful attaoll, There are other minutite of these forts in possossion of our officers, which it is not proper to rnake known at present. - Bjjffioe it to s:iy that through (ha meausof tho balloon ascensión, made all day yesterday, every infonnation is in our possession of the design and intenüon o{ the rebels. 3L.-jST" The less a inau kuows tLe wider he wears bis njouth open. It is as impossible for a fooi to keep his jaws shot, as it is for a sick ojstor to keep his sheil olosed. L-9" Tho soul without aetion is iike a n instrument not played upon, or like a ship in port, knowing no progress wliilo it stays there but deeay.