His biographical sketch, which was taken while he was still living, indicates that he traveled in 1864 and was in a company led by a Captain "Horn." There was not a company in 1864 led by a Captain Horne. However, the 1864 William Warren company had a George Hone/Horne. It was likely this individual was a captain of ten or fifty and this was who was being referred to in the sketch. All other evidence points to the fact that William traveled in this company. Other members of his family traveled in different years.
His death date is confirmed by the Utah Burials Database, however, various other primary sources are not in agreement.