Ou the 5th inst. - Sunday hst - Gen. Scott sent dispatches to Gen. Butler, at Annapolis, giving bim thrcc days to take poasession of the Relay IIouso, nine miles from Washington. - He responded, " I will have religious services there to-day." At noou he was on tl.c spot wifcb tliu Gth Miissachusetts and 8th Xew York Regiracnts, had possessiou of tho telegraph, and eight bowitzera plantod on the viaduct. This cuts off all connection bctween the seoessionists of Baltiinore and that portion of Virginia haring its outlet at Hnrper's Ferry.