This has been a month of calamity.— Within three or four weeks there have been recorded in the pages of the public press the destruction of the steamship Independence in the Pacific, the Ocean Wave on the Lakes, and the Jenny Lind in California; the awful railroad calamities at Chicago and Norwalk; and now there is added the loss of the ship William and Mary at sea. By these six disasters not less than five hundred souls have been hurried into eternity; and in addition to these there have been minor accidents on railroads and steamboats, falling of buildings, c, which would materially swell the fearful aggregate.