The discussion of translations of Ars Conjectandi reminded me that there is an english translation of Huygens' De Ratiociniis in Ludo Aleae available as a pdf file at . The translation is dated 1714 and printed by S. Keimar for T. Woodward. There is a missing dedication from W. Browne to Dr. Richard Mead. None of these names are familiar to me.
I would also like to take a brief moment to thank Julio for his continued work on this forum.