Before them and to westward and far away ranged the jagged mountains, report had it, unthreaded by a single pass.
"A Victor of Salamis"
William Stearns Davis
We are left with the question of whether this slide was used in two locations or whether the artist, possibly working from notes or an earlier rough sketch, failed to show an unthreaded portion on one end or the other of the work.
"Screw-Thread Cutting by the Master-Screw Method since 1480"
Edwin A. Battison