I had all but the 1860 Sacramento census, which I'm delighted you found.
Below is more info on Thomas Duggan. I have more on my Laura and her sibs, too, should I post it?
I also have him on the1910 census
Santa Clara, CA at Agnews State Hospital
Thomas Duggan NR W 77 b England
[note: the Agnews pages are out of order on the microfilm so you have to search through the whole list of inmates to find him]
and from the CA death index:
1916 27 March Thomas Duggan, 83, dies at Agnews State Insane Asylum in Santa Clara [state file # 10635]senile dementia
and from his death certificate 16-010635
Anews State Hospital, Agnew, Cal
Thomas Duggan, male, white, widowed, wife unknown, date of birth unknown, 83 years old, iron worker, born England, father and mother and their birthplaces unknown; length of stay at Anfew 12 years 4 days; in California 53 years.
former residence - San Francisco
place of burial or removal - San Francisco
undertaker N. Gray & co. San Francisco
date of death -- March 27, 1916 7:30 a.m.
cause - senile demntia
duration - unknown
contributing - none
doctor certified he attended deceased from Dec 22, 1911 to Mar 27, 1916; last say im alive on Mary 27, 1916
wife Amelia died 25 Aug 1878 age 47 years:
"Sacramento Bee 2nd edition Monday evening 26 Aug 1878
In this city, August 25, Amelia, wife of Thomas Duggan, a native of Ireland, aged 47 years and 15 days. (Chicago and Portsouth (N.H.) papers please copy.)"
Sacramento coroner says it was of abdominal cancer.