I think I found some more info for you. Evidently Forrest was actually Deforrest. You should be able to get copies of the obits.
Obituary Times at Rootsweb.com Deforrest J. Ault Jr. age 90 Lancaster PA; Lancaster S-N 2004-7-25 (Newspaper and date of obit) Richard Raymond Ault Sr. age 84 Lancaster PA; Lancaster N-E 1999-2-2 (newspaper and date of obit)
SS Death Index Deforrest Ault b. Dec 4, 1890, d. Oct 1978 Last Residence Conestoga, Lancaster Co. PA