Peter Biddle died on 18 May 1891 in Gibsonburg, Sandusky County, Ohio.
J J Bernhart, "Biddle," obituary, Evangelical Messenger (New Berlin, Pennsylvania), 2 June 1891, death of Peter Biddle on 18 May 1891. page 347.
Peter's wife Mary died on 8 October 1898 in Gibsonburg.
BIDDLE.--Died, in Gibsonburg, O., Oct. 8, 1898, Mother Mary Biddle, aged 70 y. 10 m. and 16 d. Mother Biddle was confined to her bed for seven weeks, suffering from rheumatism. She was waiting with joy for her time of going "home," to be with the blessed Christ. A large attendance at the funeral services showed that she was beloved by the Church and neighbors.
C Schmucker, "Biddle," obituary, Evangelical Messenger (New Berlin, Pennsylvania), 10 October 1898, death of Mary Biddle on 8 October 1898. page 667.