reason to believe

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See: clue
References in classic literature ?
I have every reason to believe that he has left his employers under the most disgraceful circumstances.
He had reason to believe that discoveries made by modern travelers in Central America had been reported from time to time by the English press; and he wished copies to be taken of any notices of this sort which might be found, on referring to the files of newspapers kept in the reading-room of the British Museum.
They had good reason to believe he got home again soon after in some other boats or canoes of savages who came on shore three or four weeks afterwards, and who, carrying on their revels as usual, went off in two days' time.
There is much reason to believe, that the territory which now composes Ohio, Illinois, Indiana, Michigan, and a large portion of the country west of the Mississippi, lay formerly under water.
At any rate, I have more than one reason to believe that tedious courtships are unknown in the valley of Typee.
Moreover, as Gartner during several years repeatedly crossed the primrose and cowslip, which we have such good reason to believe to be varieties, and only once or twice succeeded in getting fertile seed; as he found the common red and blue pimpernels (Anagallis arvensis and coerulea), which the best botanists rank as varieties, absolutely sterile together; and as he came to the same conclusion in several other analogous cases; it seems to me that we may well be permitted to doubt whether many other species are really so sterile, when intercrossed, as Gartner believes.
She had reason to believe her nearly recovered from her cold, and it was desirable that she should have as much time as possible for getting the better of her other complaint before the gentleman's return.
The continent, of which this kingdom is apart, extends itself, as I have reason to believe, eastward, to that unknown tract of America westward of California; and north, to the Pacific Ocean, which is not above a hundred and fifty miles from Lagado; where there is a good port, and much commerce with the great island of Luggnagg, situated to the north-west about 29 degrees north latitude, and 140 longitude.
But there is reason to believe that President Dunster sat in it, when he held the first Commencement at Harvard College.
Vernon, and I never had the convenient talent of affecting sensations foreign to my heart; and therefore I trust you will believe me when I declare, that much as I had heard in your praise before I knew you, I had no idea that I should ever love you as I now do; and I must further say that your friendship towards me is more particularly gratifying because I have reason to believe that some attempts were made to prejudice you against me.
He studied human nature in the gutter, and found it no worse than he thought he had reason to believe it.
Few situations can be imagined more uneasy than that to which his poor master was at present reduced; for besides the difficulties he met with in discovering Sophia, besides the fears he had of having disobliged her, and the assurances he had received from Lady Bellaston of the resolution which Sophia had taken against him, and of her having purposely concealed herself from him, which he had sufficient reason to believe might be true; he had still a difficulty to combat which it was not in the power of his mistress to remove, however kind her inclination might have been.