Hello
the marriage would be very difficult to find BUT you may have more luck looking for the death registration and/or obit for Nan Henderson
here is a possiblity - the actual death registration papers would have next of kin, etc. and an obit would help figure out if this is the right Nan Henderson
Vital Event Death Registration
Name: Nancy Claire Henderson
Event Date: 1973 7 14 (Yr/Mo/Day)
Age: 60
Gender: female
Event Place: New Westminster
Reg. Number: 1973-09-010144
B.C. Archives Microfilm Number: B13326
GSU Microfilm Number: 2050139
She is buried here
HENDERSON, Nancy C. St Helen's Anglican Surrey, 108th Avenue Southwestern BCGS-C-40
Here is the address for that church - they may be able to help or direct you elsewhere - the cemetery records should indicate next of kin perhaps or the funeral home who was in charge of the arrangements
St. Helen's Anglican Church
10787 - 128 Street, Surrey, BC V3T 3Y2
Anglican Church of Canada
10787 128 Street, Surrey, BC V3T3A2
(604) 581-4800
try one of these options to get the death and/or obit copies - maybe try both to increase the chances of getting a quick response
1. RAOGK http://raogk.com/bcolumbia.htm
these are volunteers from British Columbia who will do lookups of various items including Vital Statistics and obits. Send a request for a copy of the death registeration papers above (these papers should list next of kin, place of residence, place of birth, et.) and also for an obit which should list other family members. Please send ONLY ONE request for your information or you may not receive any help (admin monitors requests and removes duplications).
2. For a quicker respose you might try this gentleman - he is usually able to assist within 2 or 3 days.
http://members.shaw.ca/copies/
He charges a small fee to cover copying and parking but is very prompt and thorough.
Good luck and let me know if I can help further
Thelma