Canal to be Opened in May

Chesapeake and Ohio Canal.— We learn with pleasure, from a source to be entirely relied upon, that the progress of the work upon the Chesapeake and Ohio Canal has been such within a few months past, as to exceed expectation, and agreeably to disappoint most of those who are engaged in it. During the month of May ensuing, we learn that the water will be admitted into the whole line of the Canal from tide-water to the head of Harpers-Ferry Falls, so as to make the whole line navigable at once. The workmen are putting the coping on the Aqueduct across the Monocacy, which is said to be a splendid structure, not excelled if equalled by any thing of the kind in the U. States, and in two weeks that work will be completed. We learn, further, that more than one half of the lockage to Cumberland is overcome in reaching the head of the Harpers-Ferry Falls, though that is but one-third of the distance.– [Nat. Int.