Marian Beck Obit

From the Spokesman Review August 3, 1900 page 5.

I checked the Moran Prairie Cemetery and did not find a Marian Beck, so I checked the Washington State Digital Archives and found this Death Return.

Then I checked the Moran Prairie Cemetery records and found:
Back, Henry S., b. 1837, d. 19--, Sec A * +
Back, Maria T., b. 1811, d. 1901, Sec A
Henry was her son and he has a lot of Military records in the Washington State Digital Archives, but I could not find him in the Washington Deaths so I checked the Idaho Deaths and found him.

IDAHO Deaths 53157 

Name of Deceased: BACK, H.S. 

Year: 1929 

Certificate Number: 067249 

County of Death: Canyon 

City: CALDWELL 

Date of Death: 07/28/1929 

Date of Birth: 03/04/1837 

So is he buried in Moran Cemetery?