From Vicksburg and Memphis.
Jackson, March 23.
--A special dispatch to the Appeal, dated Grenada, 20th, says: Dispatches to the Memphis Argus from Vicksburg, to the 13th, state that twenty five "rebels" were captured whilst tearing out the levee above the canal.
Bayon Macon is pronounced unnavigable on account of the snags.
One division of the Yankee army left Memphis Tuesday last, (13th,) on a light draft steamer, bound to Yazoo Pass.
The river is falling at Memphis; also, the upper tributaries.