Captain; with two males and 8 females: Mormon Pioneer Overland Travel,1847-1868
She died en route to Salt Lake City, Utah on June 18th: Mormon Pioneer Overland Travel, 1847-1868
See Lewis Notes for information on sources and dates.
The Mormon Pioneer Overland Trail source lists both Lewis and Willaim as unknown for birth and death dates but Lewis and William were labeled as brothers in the trail notes and Lewis was with his family in England in 1861 with the census but didn't trek in the same company with them. William was the same only he was in his own houeshold during the 1861 census.