Bibliographical sources mentioned in this text:
Aquilius, Henricus : Chronicle 62.10
Guiccardini : Germania Inferioris 62.10
Irenicus, Franciscus 62.10
Reigersberg, Ioannes : Chronicle 62.7
Schrot, Christaan is mentioned in the cartouche of the second Gelria map as its maker, Ort62
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