Fort Harrison Engineers . Expect Order to DisbandOrders to demobilize the engineers' camp at Fort Benjamin. Harrison are expected at -any hour by Col, Wilburr Willing, commandant.Maj. Herbert Lamb, camp adjutant,aaid last night that preliminary instructions as to the process of demobilization have been received from the War Department but. official word to muster out the engineers has not reached the camp.Under instructions sent by the War Department 600 men are to be mustered out daily for a period of thirty days. This will completely demobilize the 15,-000 engineers at the post,The^ speed of demobilization will depend upon the railroad • facilities for handling the men mustered out. The daily rate of 500. men will bo reduced if the railroads are unable to. handle that number.Just what activities will be continued at. the poSt 1h no* known at this time. The convalescent hospital for wounded soldiers is. being pushed to completion to accommodate 2,500 patient-1?. It is not expected that the fort will be abandoned after the engineers j depart. •