Volckert Adriaanszoon Schram (Enkhuizen, c. 1620 – 7 June 1673) was a 17th-century Dutch admiral.
http://en.wikipedia.org/wiki/Volckert_Schram
Portrait http://www.europeana.eu/portal/record/90402/C432A8BCD5C591D6C19F41D17D5D938690E2106B.html
References
Chart showing the number of references in each month of the diary’s entries.
Volckert Adriaanszoon Schram (Enkhuizen, c. 1620 – 7 June 1673) was a 17th-century Dutch admiral. http://en.wikipedia.org/wiki/Volckert_Schram Portrait http://www.europeana.eu/portal/record/90402/C432A8BCD5C591D6C19F41D17D5D938690E2106B.html