I. Golf Balls: a detailed account of the evolution of the golf ball, from pre-1850 feather balls, to circa 1850-1900 gutta percha balls, and then to the twentieth century rubber core balls.
II. British Design Registration dates
III. British Patent Dates
IV. American Patent Dates
V. Circa 1900 Golf Clubs as Defined by Authors of the Time
Top Row: Feather balls (leather exterior, feather-filled interior) by W&J Gourlay and T. Alexander; Middle row: early gutta percha balls: Bottom row: hand-hammered Forgan-pattern gutta percha balls by A. Patrick and J. Campbell.