Yes, the name William Gaugh would seem a possibility for the night of 16 and 17 September 1863 attack on the "Marcella" between Berlin and Dover in north-central Lafayette County probably by Bill Anderson's band, since Bill attacked riverboats along this particular stretch of the Missouri River off and on during the war. You should also consider the possibility that whomever took part in the "Marcella" attack was also at Lawrence, only one month previously. Further, nearly all the Lawrence raiders buttoned up tight and "law low" all through the rest of August and September 1863 until the large-scale and very persistent Union dragnet over that part of west-central MO was finished. The Yanks killed about 100 men in all during their searches, mostly Colonel Holt's recruits from Clay and Ray County and the newer members of Quantrill's group recruited by Andy Blunt and others in Saline County in July 1863. All these guerrillas participated in Lawrence but lacked experience in remaining under cover for long times and lacked basic evasion and concealment skills. Bill Anderson was far away from most of the dragnet activity in that part of Lafayette County to be able to pull off a raid on a riverboat, and he probably was not fond of waiting anyway. The real question is: Did Bill Gaugh ride with Anderson during September 1863?

William Gaugh, according to Hale's "We Rode With Quantrill," p. 85, was born Lexington, KY, his family moved to the Kansas City area in 1857, and Bill was 15 or 16 at the start of the war. Bill's dad evidently was Kentucky-born Percival Gaugh, an architect. Gaugh was an early member of Quantrill's band in 1862, participated at Lawrence, and Quantrill sent him on sensitive assignments several times during the war. Quantrill also took Gaugh with him to KY, according to John McCorkle's memoir. Just when I started to think that Gaugh was too close to Quantrill to ride with Anderson, I also read Gaugh was at Centalia on 27 Sept 1864, and supposedly carried Jesse James to safety when he was wounded. Both James brothers were with Anderson at Centralia, but I don't recall reading that Jesse or Frank were wounded at Centralia, so that may be a problem putting Gaugh with Anderson. Quantrill only took 40 hand-picked men to Kentucky in December 1864, and Quantrill was not partial to men who rode with Anderson for any length of time.

Also, the name you discovered could also be:
--William Butler Gann of the Lafayette County Gann's who lived in Sni-A-Bar Township of SW Lafayette County. He rode with Quantrill, and may have been at Lawrence, or
--William Gower who was known for a lot of the killing at Lawrence, or
--William Greer was probably the "W. W. Greer of Lexington" at the 1905 Quantrill reunion. He was probably the 16-year-old William Greer in the William and Rebecca Greer family of Washington Township of south-central Lafayette County.

From reading William Gregg's memoir I don't think he liked Anderson enough to ride with him, so I doubt he was involved, even though Gregg led the raid on the "Sam Gaty" on 28 March 1863 at Sibley in northeast Jackson County.

I hope that helps.

Bruce Nichols