He was an Austrian German, a man of noble presence, matured spirituality and an accomplished missionary.

Father Hecker knew him well in after years, and always counted him as one who understood his spirit and approved his aspirations.
The convent in St.Trond was in a narrow street of the quaint little city; so narrow, indeed, that one almost fancied that he could touch both walls by stretching out his arms.

It was a solid old structure, built in the first half of the fifteenth century by St.Colette for her Poor Clares, an ample guarantee of its conformity to the ideas of religious poverty.

It was not architecturally fine, but was a curious and interesting building.

Isaac in one of his letters home says that the house was very roomy, with long corridors having cells on each side.