Peggy,
I do not find a record (on Ancestry.com) for Rosalia Ewalt but there is a John V. Welch b. abt 1855 Ohio. His home in 1910 was in Stohrville Twp, Harper, Kansas. You can view the 1910 Census record at the library:
Series T624
Roll 441 part 2
page 11B
There were other John V Welch's listed but this was the closest birth year to the info you provided.
I hope this will be of some help.
Marsha Ewalt Black