What was a Spiller knife? The Mountain Men's boot dagger you've never heard of.
Untamed LandThe Forgotten Knife That Saved Hundreds of Lives in the Rocky Mountains Between 1820 and 1840, the Mountain Men dominated the American wilderness armed with a blade that history erased: the Spiller Boot Knife. A 150-gram dagger hidden in the boot that was worth more than gold in hand-to-hand combat.