Sorry, I don't know the people your searching out, but Ten Mile Twp. is a area North of Bellingham, Whatcom Co., WA.
There is a Ten Mile Rd., that travels East & West, crossing the Guide Meridian Rd. and the area around there is called Laurel. I think it's about 6-10 miles from Bellingham, WA heading towards the Canadian Border.
I noticed Ten Mile Twp. in some old Genealogy searches I did, and was surprised, as I didn't know it existed, but was very familiar with the Rd. I had friends that lived in this area in the 50's. Hope this helps on the location.