The _Trippe_, _Warrington_, _Jenkins_, _Wadsworth_, _Cummings_, _Wilkes_ and _Benham_ all had encounters in July which were not only successful but showed evidence that the U-boats were damaged, if not disabled. The _Parker_ (Lieutenant Commander Halsey Powell) on August 3rd had a long U-boat encounter. With the _Fanning_ and _Nicholson_, she had been escorting steamers and had just returned to patrol when a submarine was reported about 30 miles away. Speeding to the locality, at 2:15 she found the steamship _Newby Hall_ had been attacked, and was told that the U-boat had submerged probably six miles distant. Escorting the steamer toward port, the _Parker_, at 4:10 p. m. turned her over to the _Burrows_, and returned to look for the "sub." The steamship _Rio Verde_, which was in the vicinity, was escorted out of the dangerous locality, and the destroyer resumed the hunt for the enemy. At 6:50 the _Parker_ sighted the submarine, which submerged when the destroyer came within 8,000 yards. But the U-boat left a long oil slick which the _Parker_ followed down. "On reaching the end of the slick, saw submarine underneath the end of the bridge," the commander reported. "Dropped two depth-charges on the submarine and from all evidence she was very probably sunk. There was practically simultaneous explosion of the depth-charges, followed by another explosion. There was discovered on the surface of the water air bubbles, and a heavy scum of oil, and particles of what appeared to be cork." As no wreckage or prisoners were obtained, the Admiralty gave the credit "probably seriously damaged"; but the men aboard the _Parker_ were convinced that the submarine had been destroyed. The _Jacob Jones_, _Davis_ and _McDougal_ were credited with successful encounters in September, the _McDougal_ being credited in Admiral Sims' Headquarters' report of Sept. 15th, with "protection of two meeting convoys against enemy submarine," and "possible destruction" of the U-boat. While escorting a New York convoy the _McDougal_ (Commander A. P. Fairfield) at 1:21 a. m. sighted the submarine on the surface, and gave chase. The "sub" submerged 500 yards ahead. Dropping two depth-charges, the _McDougal_ circled around the spot, and soon noticed oil rising, apparently from the U-boat. A northbound convoy from France to Wales was sighted only a half mile away. "One or more ships of convoy were undoubtedly saved by the fact that the submarine was forced to submerge hastily," said the Headquarters' report. "Submarine believed to be damaged or sunk." When the large British steamship _Orama_ was torpedoed October 19, 1917, the _U. S. S. Conyngham_ attacked and drove off the submarine, saving other ships of the convoy. Her commanding officer, Commander A. W. Johnson, made this report: