Flaps - History of.

[Dewdrop]

This is probably not the correct forum but I would be interested in hearing your thoughts. When did flaps first appear on "light aircraft" ? I've been reading a lot lately about side slipping techniques and early tail dragging trainers and was wondering when and and on which aircraft flaps were first introduced.
Probably a bit of a ramble, but I,m sure you understand what I'm trying to get at.