From an email sent by Prof. Emeritus Wim Klever (Rotterdam):
This time I also wish to inform you and to ask you to forward this information about a new publication of mine about Spinoza's master Franciscus van den Enden, a book that I published privately and may be acquired via my e-mail. See attachment*. Concerning the last item mentioned at the bottom of the page [in a different email], I can now say, that a Dutch version of this manuscript has now appeared under the title John Locke (1632-1704). Vermomde en miskende Spinozist. Rapport van historisch onderzoek (2008). The English version under the title Locke's Disguised Spinozism will before long appear as a journal article. I hope that you will find a way to communicate this 'news' to the audience of your site, the friends of Spinoza. Many of my former articles are contained in books or journals you mention.
More information can be found here (in Dutch), and Prof. Klever can be reached at klever at casema dot nl.