This document may be of use to anyone interested in the history and development of Gregg Shorthand; the NYPL has a huge collection of papers, documents, draft books, photographs etc., donated by his widow, Janet Kinley Gregg.
They will copy documents (for a charge) for members of the public.
Their staff are very helpful, but the duplication service is slow; I am still awaiting an item I ordered from sometime in November.
New York Public Library - Guide to the John Robert Gregg Papers
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