The Treason Act 1442 (20 Hen.6 c.3) was an Act of the Parliament of England. It made it high treason for any Welshman to "drive, bring, carry away, or withhold" any Englishman or any Englishman's horse, cattle or goods. The Act was due to expire after six years, but was renewed for a further six years by the Act 27 Hen.6 c.4 (1448), after which it was allowed to expire.
References
Treason Act 1442 Wikipedia(Text) CC BY-SA