 The benefactions of his family enabled Heinrich to provide generously for the new community, and in 1429 to establish it on his family estate of Springbrunnen ("Ad fontem salientem"), where he and his companions, besides continuing their missionary work in the diocese, applied themselves to the copying of manuscripts.Heinrich also founded houses of the congregation at Cologne (1416), Wesel (1435) and Osnabrück, and the communities of sisters at Borken, Coesfeld, Lippstadt, Wesel and Bodeken, labouring all the while in the face of continuous opposition from both priests and laymen.He accompanied Johann Vos of Huesden, rector of Windesheim, to the Council of Constance (1414–18), to refute the charges lodged against the Brethren by the Dominican Mathüus Grabow, and of which they were triumphantly cleared.