Found that his wife Gertrude
Gertrud Gilbertson wife of Nils Gilbertson
Died 1 Nov 1920.
Place of Burial: Lake Park on Nov 7 1920.
I believe she might be buried with her husband Nils. Looking for death/burial information on him too.
I think there is also an Old Lake Park cemetery based on my internet searches.
Can you help me? Or is there a paid researcher you know of?