Navigation Of The Welland Canal - Some apprehension having been manifested by masters of vessels and others interested in the trade through this route, (originating, no doubt, from the many unfounded reports respecting it, set afloat by individuals concerned in the business of rival channels of communication with the "great West") that the navigation of the canal, this season, would be liable to continual and vexations obstructions and hindrances from the operations of the workmen engaged on the new works now in progress thereon - the principal engineer in charge, has deemed it expedient to give public notice, "that no interference on the part of the contractors will be permitted; the navigation must proceed, without regard to their interest or convenience; and if any delay should be caused the contractors, or persons employed by them, or by the Board of Works, the captains are requested to give information thereof, to the engineer who will immediately remove persons from the work."