1861. February 28.—….By the arrival of the Anglo-Saxon at Londonderry, a telegram announces the fact that the Committee of the Peace Convention had reported a plan for adjustment, made up of Crittenden’s, Guthrie’s, and the Border States’ proposal. If this be approved, the great body of the Union may be saved; with a reasonable prospect of reattracting the eight States which have seceded, and are now embodied as “The Confederated States of America.” General Jefferson Davis and A. H. Stephens were inaugurated as President and Vice-President on the 18th instant. Query: Were they chosen by popular election, or by the Convention only at Montgomery? Perhaps they are provisional only, and for a limited time.