Note 4 — Chapter IV
Reading edition
: I am indebted to the personal kindness of the discoverer's son, Herr Direktor Zetter-Collin of the Solothurn Museum, for these details. But the whole story, as well as Herr Zetter-Collin's contributions to the history of the work, should be read in his own absorbingly interesting monograph:—"Die Zetter'sche Madonna von Solothurn. (…) Ihre Geschichte, etc." 1902.