As an aside we note that the world's first successful oil well was drilled beside Titusville in about 1860 and this marked the start of a Pennsylvania oil boom of which, of course, Mary's father was a part.
Bilang isang tabi namin tandaan na ang mga mundo ng unang matagumpay langisan ay drilled sa tabi Titusville sa tungkol sa 1860 at ito na minarkahan ang pagsisimula ng isang Pennsylvania dagundong ng langis na, ng mga kurso, Mary's ama ay isang bahagi.