Either I missed this, or forgot about it and have re-discovered:
Bonnie Hurd Smith has put Judith Murray's catechism online.
This was one of my project long, long ago. The University of Georgia has a gigantic set of early American imprints on microcard (heavens!) but had no microcard printer. This meant I was transcribing it longhand, and typing it out on a campus computer. I didn't get far.
Glad to see I don't need to revisit that work!