Consult the book on the site www.archive.org. What additional information you get about Isaak Iselin–Roulet? And what is his individual paragraph–number?
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Part of a vast family tree, Isaak Iselin–Roulet turns out to be the direct ancestor of most of the Iselin family members living today in Basel. The cutout shows him with his brothers and sisters. Family tree (extract) from: Weiss–Frey, Friedrich. Heinrich Iselin von Rosenfeld und sein Geschlecht. Basel: Emil Birkhäuser, 1909, appendix.
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