Rubuta ci gaba ga wannan sakin layi - Mason ya shirya rubutun farko na Yarjejeniyar Hakkin Virginia a 1776, kuma kalmominsa sun kasance da yawa daga cikin rubutun da aka amince da shi ta hanyar juyin juya halin Virginia na ƙarshe. Ya kuma rubuta kundin tsarin mulki na jihar; Thomas Jefferson da wasu sun nemi taron ya karɓi ra'ayoyinsu, amma sun gano cewa ba za a iya dakatar da sigar Mason ba. A lokacin Yakin Juyin Juya Halin Amurka, Mason ya kasance memba na majalisar wakilai mai karfi na Babban Taron Virginia amma, ga fushin Washington da sauransu, ya ƙi yin aiki a Majalisa ta Continental
a Philadelphia, yana mai cewa yana da alhakin kiwon lafiya da iyali.