Ah....
The thought plickens, or is that the plot thickens?
On page 82 of The Muzzle-Loading Cap Lock Rifle , by Ned H. Roberts, Copyright © MCMXL, MCMXLIV, MCMXLVII and MCMLII by NED H. ROBERTS, Printed by BONANZA BOOKS, NEW YORK, the author wrote:
Generally speaking, a very fine grain...