At 11.40 P.M. the fog set in thick and lasted until about 1.25 A.M., June 15th. At 3.20 A.M. the convoy was sighted on the port bow, distance four miles. During the watch the ship logged over 12 knots by revolutions of main engines, but due to deep draft was unable to keep up. The blowers were run continually to assist. The forward boiler could not be lighted off as it was banked in with reserve coal supply. Between 4 and 5 A.M. while cleaning fires the speed by revolutions dropped to 11 knots. A moderate sea was running which caused seasickness among the firemen. The firemen were drafted from the U.S.S. _Delaware_ through the receiving ship at New York and were unfamiliar with firing Scotch boilers and not accustomed to the quick and deep roll of small ships. Most of them became useless during the cleaning fire period and their places were taken by petty officers of the engine and fire-room watch. The ship continued to lose distance astern of convoy, a logged speed of 10½ knots being maintained. I gave this matter my personal attention and every effort was made to rejoin the convoy. From noon to midnight an average speed of 11¾ knots was logged. At 4.45 P.M. the _Wilkes_ came within hail and made inquiries as to the cause of the _Corsair’s_ inability to keep in position. _June 16th._ An average speed of 10½ knots was logged for the day. I found that the seasoned men, most of them petty officers, were showing fatigue due to the hard steaming qualities of the ship. A number of volunteers from the deck force went below and passed coal and handled ashes to assist. The reserve coal from the dead fire-room was removed to allow the forward boiler to be lighted off. Group No. 1 was not seen this day. Group No. 2 was sighted astern at 3.40 A.M. Lighted fires in boiler No. 1 at 6 P.M. _June 17th._ Maintained about 11 knots (by revolutions). Some of the firemen who had suffered from seasickness were back at useful work and the ship had become considerably lighter. At 5 P.M. cut in boiler No. 1 and increased speed to 13 knots. Between 1 and 2 P.M. two U.S. destroyers passed six miles to the southward, one heading east and one west. _June 18th._ Averaged 13½ knots until 10.40 A.M. when speed was reduced to 10 knots to lose distance and join Group No. 2. _June 19th._ Proceeding at reduced speed to allow Group No. 2 to overhaul. _June 20th._ Proceeding at reduced speed, about 9 knots, to allow Group No. 2 to overhaul. It was desirable to keep a speed that was low but economical to get the mileage for the fuel.