Clay.----The Legislature of Mississippi adjourned on the 16th of March. No United States Senator was chosen for the full term, to commence at the close of the present Congress. In both Houses a bill was rejected which proposed to provide for the payment of the bonds of the State issued on account of the Planters' Bank, but both Houses passed a bill, which has become a law, submitting the question of their payment to a vote of the people. The bill for districting the State, for the election of five members of Congress, was lost, from disagreement between the two Houses--both being willing to pass the bill, but they could not agree as to the composition of the districts.----In Alabama, a Southern Rights State Convention met on the 4th. Only a small portion of the State was represented. Resolutions were adopted in favor of maintaining the separate organization of the Southern Rights party, but acquiescing in the decision of the Southern States against secession for the present.----A message from Governor Bigler, of Pennsylvania, in regard to the debt of that State, states that there is now due and unpaid two millions four hundred and ninety-one thousand two hundred and fifty-five dollars of the bonds of the Commonwealth, bearing an interest of six per cent., and a balance of near one hundred thousand dollars due to domestic creditors, bearing a like interest, besides one million three hundred and ninety thousand dollars, at five per cent.; over two millions will fall due in 1853, and about three millions in 1854. He recommends that the matured bonds, and such as may fall due during the year, be canceled by the negotiation of a loan, and that bonds of the Commonwealth be issued, reimbursable at the expiration of ten or fifteen years, at a rate of interest not exceeding five per cent., with interest certificates attached, or in the usual form, as may be deemed proper.