Corrigenda and Errata Schnitger MGG 2
“Schnitger.”
In Die Musik in Geschichte und Gegenwart, Personenteil. Vol. 14, ed. by Ludwig Finscher.
Kassel: Bärenreiter, 2005: col. 1529-1532.
Arp Schnitger was baptized on July 9, 1648
(not on Feb 9, 1648, as mentioned in the article).