An inquisitor of the 14th century has left us a lively account of a Waldensian preacher who went about in the guise of an itinerant salesman. It seems that upon his arrival at the local manor all the townspeople, including masters and servants, would gather around while he showed his various wares--fabrics, jewelry, and artifacts. ...

But even as he sold he would make allusion to more precious goods in his possession, to jewels of inestimable value he was in a position to offer. The curiosity of his audience kindled, the Waldensian would then speak of The Pearl of Great Price, the Gospel of Jesus, and gradually proceed to contrast the official Church, in its love of power, riches, and luxury with the purity of the Gospel. ...

In Germany they were called "apostles." A Polish saying tells us they were "men who tell the truth."