Horstman, William F.
William F. Horstman (1860-1940) is described in Martin as born in St. Louis, MO, growing up in Kansas with his parents. At an unspecified date before 1900 he came to California, settling eventually on a tract of land outside Boulder Creek on Two-Bar Creek, where he grew wine grapes and became a vintner. Oddly, Martin doesn't mention that William's father Christian Horstman preceded his son in the Boulder Creek area, and in viniculture there.
- Hazel Horstman Lundgren [daughter of William F.], "Memories and Milestones of the Horstman Family of Boulder Creek, 1874-1974", Santa Cruz County History Journal Number 2.