In 1537 Munster had published Hebrew Matthew (as discussed in above). Twenty years later, in 1557, a second edition was printed containing a complete Hebrew text of Hebrews in an appendix.
Munster obtained his Hebrew Hebrews from among the Jews, it seems safe to say that this was the case. Munster did plainly make this claim of his Hebrew Matthew in 1537, so it seems likely that this was also the source for the supplemental Hebrew Hebrews, in the 1557 edition of his Hebrew Matthew. (Munster had died before the publication of his second edition in 1557, which may explain why he had not written an introduction for the Hebrew Hebrews, explaining its origin.)
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