...Without him the rising would crumble... 
John Buchan 「Prester John」
...These are mosttiresome to deal with, getting worse the higher we go, and so rottenand weather-eaten are they that they crumble into dust and fragmentsunder our feet...
Mary H. Kingsley 「Travels in West Africa」
...I dig into the hard rock, crumble it, loosen it until I make room for thought to penetrate...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...They dig clean passages, they slash and crumble without a slimy trail, they are the pinkers...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The putty is thickened with whitinguntil the pellets will roll hard, but they should not be dryenough to crumble...
Montagu Browne 「Practical Taxidermy」
...Under coverthey play their part well; but in open and exposed situations the frostand rime make them crumble, and they go to pieces...
Vitruvius 「Ten Books on Architecture」
...Unmortared cellar walls are frequentlylaid under wooden buildings, and pointed with lime-mortar inside;but this is sometimes dug out by rats, and is apt to crumble and fallout otherwise...
Lewis Falley Allen 「Rural Architecture」
...If a miracle didn't come, America would crumble evenas old Europe had, before the overwhelming Slavish troops...
Various 「Astounding Stories, February, 1931」
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caldrons varieties brutal
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