Mezue ahịrịokwu na-esonụ: Dabere na Houbraken ọ bụ nwa Pieter Jansz Schagen, onye ndụmọdụ dị mkpa nke Alkmaar, onye mbụ kụziiri Salomon van Ravesteyn na onye na-ese ịnyịnya Pieter Cornelisz Verbeeck. O jiri ụgbọ mmiri gaa Gdańsk ebe Joost Brasser nabatara ya, wee gaa Elbing, ebe Bartholomeus Strobel nabatara ya. Schagen sere Eze Poland ihe osise iji "gosi na ya bụ ọkà n'ise ihe". Site ebe ahụ ọ gara n'ụlọ maka obere oge tupu ya abanye n'ụgbọ mmiri gaa Dieppe wee gaa Paris, ebe o sere ọtụtụ ndị dị mkpa ebe ahụ na Orleans. N'October 1639 ọ banyere ụgbọ mmiri ọzọ, ma gafee English Channel gaa England. Ọ gara leta Admiral Maarten Tromp n'ebe ahụ, onye kpọrọ ya ka ọ see ụgbọ ya ma lelee agha mmiri ahụ maka mmụọ nsọ. N'oge ahụ ọ na-aga ịlụ agha
Agha nke Downs megide ndị Spen n'okpuru Antonio D'Oquendo. Otú ọ dị, mgbe Schagen lechara agha ahụ, o kpebiri ịlaghachi Netherlands n'ebughị ụgbọ mmiri ndị ahụ. Ọ biri n'Alkmaar ebe ọ ghọrọ onye otu vroedschap dịka nna ya. Mgbe udo nke Westphalia na 1648 o mere njem ọzọ na Brabant na Admiral van Dorp na van den Cornput van Dordrecht. N'afọ 1651, o mere njem gaa Liege na Cologne. Ọ bụ onye a na-akwanyere ùgwù nke na-elekọta ogige ụmụ mgbei dị n'Alkmaar mgbe ọ nwụrụ mgbe ọ dị afọ 52.