A Captain of a vessel, who is just arrived with powder and arms, informs, that he met with Lord Dunmore's fleet off the Capes, standing out to sea, in two divisions, one to the southward, and the other to the northward. They have been several days lying in Lynhaven Bay, and have burnt some small vessels which probably they had not men to manage, or were unfit for a voyage. ー May they never return.