...All that I propose to do here is to separatewhat is matter of fact from what is matter of conjecture, and leave it tothe reader’s judgment to decide whether the data justify the inference ornot... 
Miguel de Cervantes 「The History of Don Quixote, Vol. I, Complete」
...In the morning of the following day his perceptions, sharpened by apprehension, made him conjecture that something extraordinary had occurred...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
... But this is matter only for conjecture, things having gone otherwise than he forecast...
Robert Louis Stevenson 「Kidnapped」
... “Beyond this, all is conjecture...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...There were several ceremonial places of varying sizes,the purposes of which Tarzan could only conjecture...
Edgar Rice Burroughs 「Tarzan the Terrible」
...He did not waste any more time in useless conjecture, but clapped his hat on his head, and ran to Raoul’s lodgings...
Alexandre Dumas, Pere 「Louise de la Valliere」
...No inspection of the body being ever allowed by these people, and the place of sepulture being carefully concealed, I had to rest satisfied with conjecture...
David Livingstone 「Missionary Travels and Researches in South Africa」
...This confirms my conjecture on finding Lualaba at a lowerlevel than Tanganyika...
David Livingstone 「The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873」
...) holds all conjecture useless...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...Winwood Reade suspects them to be an offshoot of the great Fulah race, and there is nothing in point of dialect to disprove what we must at present consider a pure conjecture...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 1」
... in which to conjecture his errand...
William Still 「The Underground Railroad」
...I doubt whether this conjecture be well founded; it certainlydoes not apply to the Pteropus and the other frugivorousspecies, in which the faculty of sight is singularly clear...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...What effectthe mellow sounds of millions of these, covering the shallow bottomof a tranquil estuary, in the silence of night, might produce, Ican scarcely conjecture...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...These characteristics are soremarkable as fully to justify the conjecture that the mosquito,and not the ordinary fly, constituted the plague inflicted uponPharaoh and the Egyptians...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
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