For whatever reason, George W. Gilmore started another cemetery that he would name the Donora Cemetery perhaps because they were running out of room at the Gilmore Cemetery. After selling a good portion of their Gilmore's Landing property to the American Steel and Wire Company, blueprints show that they still had land, titled the "Gilmore Estate," higher on the hill above the Gilmore Cemetery. We assume the Donora Cemetery was there because of the one lone gravestone that seems out of place and that person is not documented in the Gilmore Cemetery Burial Ledger but is documented in the Gilmore papers.

Unfortunately, this cemetery would suffer the same fate as the Gilmore Cemetery when it was plagued by the same culprit - the Donora Zinc Works.

In the Gilmore Papers Collection, we have documentation that chronicles the timeline of the short-lived Donora Cemetery that states:
On December 1, 1907, the Donora Cemetery was formally incorporated with a business address of 909 Heslep Avenue - the George W. Gilmore home address.
On April 15, 1908, correspondence from George W. Gilmore to a Pittsburgh attorney shows that he is trying to organize the Donora Cemetery Company.
On June 4, 1908, the first meeting of the Donora Cemetery stockholders was to occur.
On June 17, 1908, one hundred cemetery lot markers were ordered.
On September 23, 1908, George W. Gilmore had E. Jay Liams survey the Donora Cemetery property.
On March 16, 1909, advertising was purchased in The Donora American newspaper.
On June 23, 1909, Chas. Hern died at the age of 68 in Pittsburgh and transported to Donora by the Pittsburgh, Virginia and Charleston (PV&C) Railroad three days later. Hern is buried higher on the hill above the Gilmore Cemetery and beyond the end of Castner Avenue. Hern's death certificate is among the Gilmore papers and his name does not appear in the Gilmore Cemetery Burial Ledger.
On June 30, 1909, one hundred deeds were ordered in book form from a printer.
On March 23, 1910, a plot was purchased by Emil C. Mosebaugh for $25.00 on a Donora Cemetery form.
NOTE: There is no Donora Cemetery Burial Ledger that we're aware of, nor is there a blueprint.
In 1933, just like the Gilmore Cemetery, the Donora Cemetery stopped paying taxes per a 1933 Return of Capital Stock Tax form.
In 1934, just like the Gilmore Cemetery, on a Claim for Exemption from the Capital Stock Tax form, the Donora Cemetery stated, "This company has never been active. It was organized to promote a burial ground, but only a few burials took place. Shortly after its organization all vegetation was destroyed by the Donora Zinc Works and the property has been undesirable ever since as a burial ground."

We are only aware of the singular gravestone for Chas. Hern in the woods beyond the end of Castner Avenue. It's our assumption that this was the site of the short-lived Donora Cemetery owned by the Gilmore family. If there are other graves around the Hern gravestone, these aren't in the Gilmore papers documentation that we have, and they aren't marked by gravestones.

NOTE: The Hern grave is not easy to find among the overgrown forest and weeds.