The anonymous ground for keyboard Uppon la mi re (MB, LXVI, 1995) in the collection Add.29996 (London British Library) is often attributed to him.
Further reading
Ian Payne, "Instrumental Music at Trinity College, Cambridge, c. 1594-c.1615: Archival and Biographical Evidence," Music and Letters 68 (1987), pp. 128–140.
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John Caldwell. "Preston, Thomas." Grove Music Online. Oxford Music Online. Oxford University Press. Web. 12 Jan. 2013.