I'm glad that was good news, because now I have to burst your bubble on S L Spencer.
It is Sarah L Spencer, wife of physician John C Spencer. I finally found John living at 1544 William in the 1912 directory. Ancestry shows them living in Skidegate in the 1911 census, but the index is linked to the wrong image, so here is the index info:
Name: John C Spencer
Gender: Male
Marital Status: Married
Age: 51
Birth Date: Oct 1859
Birth Place: Ontario
Relation to Head of House: Head
Race or Tribe: English
Province: British Columbia
District: Comox-Atlin
District Number: 8
Sub-district: 30
Sub-District Number: 30
Place of Habitation: Skidegate
Neighbors: View others on page
Household Members:
Name Age
John C Spencer 51
Sarah L Spencer 42
Dora D Spencer 15
Bertha M Spencer 8
Harold H Spencer 6
Ralph E Spencer 2
This *could* be their marriage:
https://familysearch.org/ark:/61903/3:1:S3HY-696Q-GTG?i=2782&cc=1307718 although his occupation at that time looks more like missionary?
Good luck in your endeavour!
Edit:
http://www.longislandsurnames.com/getperson.php?personID=I5422&tree=SpencerWhat stands out to me is the line "
she followed her husband to the Skeena River area
of B.C. where he was a missionary. Her description of the journey is available."
I'm wondering if this is online, and if there is some contact person that could point you to it, in case she talks about the people you are looking for.