Swan Creek Cemetery is on Rt. 20, near the village of Monclova, southwest of Maumee. Maumee is a suburb of Toledo. I believe the Monclova Township trustees have information on this cemetery but they are very difficult to reach.
Emma is one of four IRWINs buried there. There is one PETERS also: Irwin, Frank 1862-1949 Irwin, Emma 1866-1897 Irwin, Olive A. 1884-1954 Irwin, Francis A. 1885-unk Peters, Charles W. 1881-1946
The 1910 Ohio census index shows this IRWIN family living in Lucas County: