[Fiction question] Does an old-fashioned outhouse door open out or in?

And what is the latching mechanism? I seem to remember turning a wooden peg on the inside—this was at my grandfather’s old family homestead in Nova Scotia—but I don’t remember what held the door shut from the outside. I’m sure it wouldn’t have been designed so that you could lock your little brother in, but I also don’t remember the door just swinging open. Seems like one good storm would take the door right off if it weren’t secured somehow.

Can you describe an outhouse such as might have been in use seventy to a hundred years ago in the northeastern U.S.? I don’t need interior detail, just a typical door.