What do you already know? What do you want to find out?
Let's add those dates of birth:
Jane born about 1834 in Ontario per 1895 MN census.
William born about 1823 in England per 1895 MN census.
Living in Sauk Centre, Stearns County, Minnesota in 1895.
In 1940 US Census a person named Ben H Boulton of the right age and born in Minnesota lived in El Paso at 3608 Douglas Street (El Paso County, Texas) with wife Margaret and young daughter Barbara E. Their residence in 1935 is listed as San Francisco, although they appear to be in El Paso in 1930 census. Daughter Dorothy J. Boulton seems to be born in San Francisco per California Birth Index on Ancestry.com.
USGWARCHIVES.NET lists a Benjamin Hadley Boulton who had a daughter with [spouse] Margaret Biggs in El Paso - daughter Barbara Ellen Boulton.
From Masonic Lodge Cemetery list (part of Concordia Cemetery in El Paso) on RootsWeb:
BOULTON, Benjamin H born 1883 died 1944 buried Dec. 19, 1944
BOULTON, Margaret Biggs born 1899 died 1981
This announcement from El Paso Herald Post [newspaper] shows that the Ben Boulton family lived in Los Angeles prior to El Paso. Jane's name seems to be Dorothy Jane (1930 census Dorothy Jane b abt 1917):
Saturday, October 02, 1937
"MID WINTER CHOSEN FOR BRIDAL
Popular Couple Will Live Here After Honeymoon
MISS JANE BOULTON daughter of Mr and Mrs B H of 3608 Douglas street and JACK R McNUTT son of Mr and Mrs C M McNutt of 3115 Federal street will be married....Announcement of the engagement was made today by the parents...Wedding of the popular young couple will be an important event of the midwinter season Miss Boulton came to El Paso with her parents several years ago from Los Angeles She was graduated from Austin High School where she was prominent in school and social activities She is an Amazon She is a granddaughter of J H Biggs and the late Mrs Biggs pioneer... Miss Boulton is employed at the Mountain States Telephone Co Mr McNutt was reared in El Paso He was graduated from Austin High School attended the College of Mines and Texas University where he was pledged to the Sigma Phi Epsilon Fraternity Mr McNutt is a brother of Blaine Cecil Roy Joe and Mary Jane McNutt all of El Paso and Trevor McNutt of Lordsburg After a honeymoon trip the couple will live in El Paso Mr Mc Nutt is associated with his father in the McNutt Oil and Refining Co."
McCormick, Barbara Boulton obituary 16 July 1999, found on El Paso, Texas Obituary Index 1999-2000 (GenLookups)
We volunteers will inevitably post information you already have, so do clarify what you need and we'll get going on that.