I checked the newspapers hoping the obit would say who his wife was.However the obit only shows J Matterson (Newspapers were notorious for misspelling names).
DIES AT RIPE AGE
J Matterson, the father of Mrs. Robert Mann, died yesterday at the ripe old age of 80 years.The funeral will be held today at the Coeur d’ Alene undertaking parlor at 2 pm.His affliction was dropsy.
The deceased was an old soldier, having fought for his country many years ago.
The Morning Journal (Coeur d’ Alene), Saturday, September 12, 1908
Same Obit listed in The Journal (Coeur D’ Alene) Friday, September 18, 1908
Then I found in the Pinegrove Cemetery:
James I H Masterson (no dates) buried in the same plot as Margaret Masterson (died 02-09-1924)
Mrs. Margaret Masterson, former resident of Rathdrum, who died in Spokane February 5, at the age of 97 years, was laid to rest in Pine Grove cemetery, Rathdrum, last Friday afternoon.The funeral was held from the Cassedy chapel.Surviving relatives, including her son, O. B. Masterson of this city, also numerous friends of the family, were in attendance.
Rathdrum Tribune, Friday, February 15, 1924
Could this be the same people you are looking for?
I also noticed in the Restlawn cemetery:
Harold Masterson 189911-20-1964
and in St Thomas Cemetery
Lucretia Masterson 188602-05-1980
Could they be related?
And in the KOOTENAI COUNTY BIOGRAPIES site (from a history book published in 1903:
0. BOUTON MASTERSON This young man is one of the well known business men of Postfalls and is at the present time operating a retail liquor store there, carrying a fine stock of goods. He was born in Sheridan, Oregon, on June 16, 1869, being the son of James H. and Margret J. (Copenbarger) Masterson, natives of Kentucky and Illinois respectively. The father was a practicing physician and continued at his profession until the time of his death in Rathdrum in 1894. The mother still lives in Seattle. Soon after the birth of our subject, the parents came to Spokane and there he received the beginning of his education. Later they went to Rathdrum where he completed his scholastic training. At the age of seventeen he started for himself and his first occupation was clerking in a hotel.
In 1888 he started a restaurant in the Coeur d'Alene mining district and conducted it for four years. Then he returned to Rathdrum and clerked for two years, after which he went to Seattle and was manager of the Globe Hotel for one year. Returning to Spokane he soon thereafter went to Medical Lake and operated a cigar store for a time, then sold out and came to Postfalls and opened his present business, where he is doing well.
Mr. Masterson married Miss Clara A., daughter of W. A. and A. M. Hart, who live in Rathdrum, where Mr. Hart does a general banking and merchandising business, being one of the leading business men of the county. To Mr. and Mrs. Masterson one child has been born, Hawley B., going to school.