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In analyzing the lists of the Dutch fleet from May to June 1653, we immediately notice that the Prinses Louise, commanded by Abel Roelantsz, and the Groningen, commanded by Gilles Thijssen Campen are not mentioned. The problem with that is that in Brandt's biography of De Ruyter and Vol.V of The First Dutch War, in De Ruyter's journal entry, the two officers are named as division commanders in two squadrons. The question is, where is the error. Is it in the lists?