On Monday, August 22d, 1864, at 9 o'clock, a.m., the Valley City was ordered to the mouth of Roanoke river, where the United States steamers Ceres and Sassacus were anchored. We were to take a very dangerous and responsible position, immediately at the mouth of the Roanoke river. During the long dark nights the Valley City did not anchor, for it was rumored that the Confederate ram Albemarle might come down any night, and especially a very dark night under the cover of the darkness, so that the Valley City must be constantly on the alert. If the Albemarle did make her appearance at the mouth of the Roanoke river, the Valley City was to fire one gun as a signal to the fleet, which was anchored six miles farther down the Albemarle Sound, and then steam towards the fleet. This Confederate ram was a formidable adversary on water. She had a sharp arrow-like ram extending twenty feet under water in front of her bow. She was plated with iron, which completely protected her inmates from solid shot; she had two two-hundred-pounder Brooke's rifled guns on the inside of this iron encasement, and one port-hole to each of her four sides. She was very unwieldy, but in a body of water like the Albemarle or Pamlico Sound no wooden vessel could cope with her. Friday, August 25.--I visited Edenton to-day for the first time. It is situated pleasantly on the bank of Edenton Bay, as it is called, but really Albemarle Sound. The people are kind, courteous, educated, and hospitable. There were magnificent residences in the place, each of which was surrounded by a large yard with shade trees, having that comfortable, spacious, home-like appearance, which so many of the buildings in Southern cities present. When the officers of the Valley City first visited Edenton, they were treated very coolly by the people; but gradually they became quite sociable, and we were invited to visit many of the families of the place--in fact, one of our officers afterwards married an Edenton lady. Edenton was a sort of neutral ground, at which the Federal officers and Confederate officers often met. On August 31, the day was clear and cool. Nothing took place of any note except a false alarm that the ram was coming down the river, causing some excitement aboard the Valley City. Thursday, September 1, 1864, the double-ender Shamrock came up from the fleet. Last night some army gunboats took an armed body of men up the Chowan river, to be landed and marched across to Plymouth for the purpose of destroying the Albemarle. The project was not successful. The day is cool and hazy. The double-ender Wyalusing came up from the fleet during the night. The Albemarle ram is expected out to-night. 2d.--The ram did not make her appearance. The double-enders all went to Edenton. The weather is pleasant.