...None knew other than that Pan-at-lee had gone to her cave with theothers the previous evening—there was no clew, no suggestion as to herwhereabouts... 
Edgar Rice Burroughs 「Tarzan the Terrible」
...The only positive clew was the fresh dung of the elephants, and this being deposited at long intervals rendered the search extremely tedious...
Samuel White Baker 「In the Heart of Africa」
...The order was given to clew up the courses and take a reef in the topsails...
W.H.G. Kingston 「The Two Supercargoes」
...In the superficial, or cutaneous, form the presence of aswollen tongue, throat, and dewlap, or even of the lower portion of the legs,gives us a clew to the trouble...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The room gave him no clew...
Albert Payson Terhune 「Further Adventures of Lad」
...When I returned, he had moved two paces, he said (he had really moved four), and we spent a half hour stooping over the daisies and the buttercups, looking for the lost clew...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...Then he took a longwalk down about the vineyard as if in hope ofhitting upon some clew...
John Burroughs 「Bird Stories from Burroughs」
...“Ah, who shall lift that wand of magic power,And the lost clew regain?The unfinished window in Aladdin’s towerUnfinished must remain...
Jennie Ellis Keysor 「Great Artists, Vol 1.」
...We have now to note a peculiarity ofthese zones which ought to furnish a clew to the sun'smechanism, although up to the present time it has notbeen successfully traced out...
George C. Comstock 「A Text-Book of Astronomy」
...It blew so strong as to make it necessary to clew down all the sails; and until next morning [SATURDAY AUGUST 8], nothing above close-reefed top sails could be carried with safety...
Matthew Flinders 「A Voyage to Terra Australis」
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