I found this information regarding Lorna.
In 1885 Lorna and family were living in Larimer, Colorado.
F. J. Annis, b. MI, 31, lawyer.
Maria, 29, b. MI, wife.
Claude, b. CO, 5.
Lorena, b. CO, 3. according to the Colorado State Census.
In 1900 the Annis family was living in Fort Collins, Larimer Co., CO.
Frank J. Annis, b. MI Jan 1854, marr 22 yrs, lawyer.
Maria V., wife, b. MI, 44, b. May 1856, had given birth to five children but four alive in 1900.
Claude H., b. CO, July 1878, apprentice electrician.
Lorna E., b. CO May 1882.
Wade D., b. CO, Aug 1885.
Margie G., b. CO Jan 1888.
Sophia W., mother, b. NY, Sept 1822, gave birth to one child who was alive in 1900, landlord, widow.
In 1910 some of the family was living in Denver Ward 14, Denver, CO.
Maria V. Annis, head, divorced, b. MI, 53, 5/4.
Lorna E., b. CO, 27, single, teacher public school.
Margie G., b. CO, 22, single, milliner wholesale store.
A Lorna E. Annis purchased land township/direction 9/North, range/direction 67/West as found in the Register of Homestead Entries, 5. Vols. Homestead Act, Bureau Land Management=6, Application=25336.00. Source: Denver Land Office Records 1862-1908, Ancestry.
You can find more information from the Bureau of Land Management.
In 1920 Lorna Annie Preston was living in Denver, Denver Co., CO.
G. Louis Preston, head household, b. England, 32 yrs old, immigrated 1911, pa=pending papers, auto mechanic auto agency.
Lorna, b. CO, 37.
Lillie, b. CO, 3.
I didn't find any death info for G. Louis or Lorna. There is a volunteer who will look up death info at Random Acts Genealogical Kindness. Go to raogk.org, read guidelines, choose California, choose Alameda Co. and choose Becky.
When you get her exact death date, you can request an obit from RAOGK.
A Lillie Maria Preston b. 23 Nov 1916, CO died 26 Dec 1990, Nevada Co., CA. Mother's Maiden Name=Annis. Father's Surname=Preston. Source: California Death Index 1940-97, Ancestry.
You can request an obituary from RAOGK, choose ALL for County.
In both counties you can order copies of their death certificates from the County Clerk-Recorder. Their cause of death will be on the death certs. Successful Searching!