Harold Parker Newlin
Attorney in Pennsylvania. Married Miss Abercrombe.
Specialist in early half dimes and dimes. His collection was sold at auction by John Haseltine April 10, 1883. Some pieces were bought in by Haseltine and retained in the Newlin collection.
He was technically not a dealer but did act as the agent in the sale of several collections. Newlin owned the Colonel Adams collection of gold coins. Many coins were sold privately to T. Harrison Garrett.
Author of The Early Half Dimes of the United States in 1883. There were 100 copies of the original edition printed. Forty of those had heliotype plates. It was reprinted in 1933.Source credit: Pete Smith, American Numismatic Biographies