Caper John , Senior, after officiating as Pastor of the Evangelical Church of Meseritz for about twenty-eight years, changed his sentiments late in life, and went over to the Socinians. He was re-baptized in a pond at Smigel, on the last day of July, 1588 ; on which occasion Valerius Herberger, a popular Evangelical Minister, wrote some satirical verses. It is said, that Caper presided as Minister over the Socinian Church at Smigel, from the time of his conversion to that of his death ; and that, in the year 1608 or 1609, he was drowned, by a company of horsemen, in a pond at that place,—probably the very pond, in which he had been immersed at Ids baptism twenty years before.

In the Acts of a Synod of Evangelical Ministers, held at Posnania in 1566, it is recorded, that Caper was removed from the ministerial office at Meseritz, on account of certain opinions, which he entertained concerning the Lord's Supper: but he does not appear, at that time, to have gone over to the Antitirnitarian party.

He published, in 1565, A Dialogue on the Lord's Supper between a Brandenburger and a Pole, in which he expressed his agreement on that subject with Zwingle. To this Dialogue Erasmus Gliczner published a reply, in which he designates Caper, "Ecclesiarum Renascentium in Majori Polonia Inspector."

(Vidend. Bock, Hist Ant. T. I. pp. 92, 93.) 

(Vidend. Bock, Hist. Ant. T.I. pp. 92, 93.)