From, A Grammar of the English Language, by William Cobbet. (1818)

"The Participles, however, are different in point of importance. They are of two sorts, that active and the passive. The former always ends in -ing and the latter is generally the same form of the past time of the verb out of which it grows. Thus: working is an active participle and worked a passive participle."

(Page 59 of The GEL)