Your husband's grandfather, Robert D. MATTE, gave his date of birth as Nov. 13, 1925 at the time he applied for his Social Security card. I used the Advanced Search at the online Social Security Death Index :http://ssdi.rootsweb.com
If I had clicked on "SS-5 Letter" at the right-hand end of Robert's entry, RootsWeb would have generated a form letter for me to print out and mail in (with a $27.00 fee) to the Social Security Administration. After waiting several months, I would have received a copy of his SS-5 containing his birthplace and the names of his parents---which you know already.
There was a state census in Washington State in 1892, but I am not experienced in research for that state, so I don't know if it is accessible or indexed or dusty.
The federal census of 1900 was indexed by the Soundex method. Perhaps they asked each inhabitant where he was born---that's one of the questions you want answered for Charles.
Information about applying for birth, marriage and death records in each state is posted online at :http://www.cdc.gov/nchs/howto/w2w/w2welcom.htm
Good luck from Reg Niles