Your William E. Pryor is buried in the Wyandotte Cemetery:
Section 1 -South Side: William E. Pryor, April 8, 1895-Jan 23,1971,Missouri PVT358 INF90 DIVISION World War I.
Also: Belvia L. Pryor,1903 - 1978.
(All of this is on page 87 of the:
Cemeteries of Southern Ottawa County Oklahoma Published by Stauber Books, Grove Oklahoma Printed in the United States of America from author submitted camera ready copy by: The Gregath Publishing Company Wyandotte, Oklahoma74370