from the GNU version of the Collaborative International Dictionary of English
- adv. Like a Protestant; in conformity with Protestantism.
from The Century Dictionary and Cyclopedia
- In conformity to Protestantism or the Protestants.
Sorry, no etymologies found.
It's been several decades since I last read Emerson; I was leaning toward socialism when I was a college kid and Emerson seemed very "protestantly" socialistic--I quit reading Emerson when I got involved with the Libertarians in Holland, Michigan, reading Ludwig Von Mises and Freddie Hayak, Austrian economists, and liking it because of the liberty it offered but not liking it because it was too much Calvinism for me.
Unluckily our ammunition was soon spent, for it is not above a year that there have been any apprehensions for Ireland, and as all that part of the country are most protestantly loyal, it was not thought necessary to arm people who would fight till they die for their religion.