1.  Sarah Elizabeth Titcomb.  1882.  Early New England People.  W.B. Clarke & Carruth, Boston (online at GenealogyLibrary.com).

In a biographical sketch of Henry Dunster, first President of Harvard College, who came to America in 1640, there is mention of the publication of the Bay Psalm Book, which appeared in two editions, in 1640 and 1647.  It was the first book printed in North America on the first printing press in North America, which was set up in President Dunster's house in Cambridge, MA.  The translation of the psalms into English was done by Richard Mather of Dorchester and John Eliot and Thomas Weld of Roxbury.  The new version was not entirely satisfactory, so it was given to President Dunster, a master of Greek and Hebrew, for further improvement.  Associated with Dunster in that effort was Richard Lyon.

2.  John Farmer.  1829.  A Genealogical Register of the First Settlers of New England.  Lancaster, MA (reprinted 1964-98 by Genealogical Publ. Co., Baltimore, MD; Broderbund CD-504).  On p. 186:

LYON...  RICHARD, was the coadjutor of President Dunster in improving the New-England version of the Psalms.