...They bring bits of timber, which they throw into thepitfall, the captive treads them down until he is elevated to aposition whence he can escape from his prison... 
Nathaniel Southgate Shaler 「Domesticated Animals」
...Withharmonies and accordances lost to the untutored gaze, colour meets himin every stone he treads on—in the mineral, vegetable, and animalcreation—in the heavens, sea, and earth...
George Field 「Field's Chromatography」
...I looked up, and a tractor just missed me as it rolled by onswishing treads...
Various 「Astounding Stories, July, 1931」
...Hazily, the steel prow of a warmachine was forming itself on the metal disk; caterpillar treads movedlike ghostly shadows beneath...
Harl Vincent 「Wanderer of Infinity」
...He struck across country for the treads of the Wabbly once more...
Murray Leinster 「Morale」
...Then the treads moved, and with a swift celerity the Wabbly movedsmoothly forward and up the incline toward the cannonading guns...
Murray Leinster 「Morale」
...It was partly made up of the noise ofinternal-combustion engines of unthinkable power, and partly ofgrumbling treads forcing a way through reluctant trees...
Murray Leinster 「Morale」
...It was as high as a four-story house, and it was two hundred feet long,and forty feet wide at the treads with the monstrous gun-bulges reachingout an extra ten or fifteen feet on either side above...
Murray Leinster 「Morale」
...And the huge treads, so thick as to constitute armorfor their own protection, were so cunningly joined and sprung that they,too, seemed like part of a living thing...
Murray Leinster 「Morale」
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