Chris has it at the GK.
R. Scott Clark
R.Scott Clark is the President of the Heidelberg Reformation Association, the author and editor of, and contributor to several books and the author of many articles. He is professor emeritus of church history and historical theology at Westminster Seminary California, where he taught for 29 years. He also taught at Wheaton College, Reformed Theological Seminary, and Concordia University. He has hosted the Heidelblog since 2007 and the Heidelcast since 2009.
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How influential was Edward Leigh? This seems like a significant work.
Anyone know much about him?
I found an online version here: http://rarebooks.dts.edu/viewbook.aspx?bookid=1494
He has an interesting section on the ordinance of Psalm Singing page 609