Richard, his wife Ann, children William, Richard Jr., Mary Ann and Benjamin came from England in 1861 on the ship Manchester.
Sources from emigration, newspaper, and church (Perpetual Emigration) records prove that the Ashdown family came to Utah in 1861.
From the Life of William Neves by Dinah Alice Neves, his daughter puts them in the 1861 Ira Eldredge Company. Found on Ancestry.
He was rebaptized in Salt Lake City on 5 Dec. 1861 according to information in the 13th Ward record of members. His surname appears as "Ashton" on those records.