But Light is never known to follow crooked Passages nor to bend into the Shadow.
— from Opticks Or, A Treatise of the Reflections, Refractions, Inflections, and Colours of Light by Isaac Newton

"My only consolation is," Egbert said, "that if the brave lad is not killed at once he may yet find his way back to England.
— from The Dragon and the Raven; Or, The Days of King Alfred by G. A. (George Alfred) Henty

Whether it was the unusually severe life he had lately been leading, is not known, but it appears that by the evening the brother’s ideas were, as a result of his unwisely frequent potations, in quite a nebulous state.
— from York by George Benson

The British loss is not known exactly.
— from Sea Power in its Relations to the War of 1812 Volume 2 by A. T. (Alfred Thayer) Mahan

Of the buildings formerly occupying this area but little is now known.
— from The Towns of Roman Britain by J. O. (James Oliver) Bevan

Where the blame lay I never knew for certain, and I will make no suggestions now.
— from The Hand but Not the Heart; Or, The Life-Trials of Jessie Loring by T. S. (Timothy Shay) Arthur

It is impossible now to decide whether Leonardo, when living in Florence, became acquainted in his youth with the doctrines of Paolo Toscanelli the great astronomer and mathematician (died 1482_), of whose influence and teaching but little is now known, beyond the fact that he advised and encouraged Columbus to carry out his project of sailing round the world.
— from The Notebooks of Leonardo Da Vinci — Complete by da Vinci Leonardo

To the much honoured John Osburn , Provost of Ayr. [ Of John Osburn , merchant in Ayr, and at this time chief magistrate of that burgh, little is now known.
— from Letters of Samuel Rutherford (Third Edition) by Samuel Rutherford

How the story came to be localised is not known, but in its last phase it had reached this form.
— from The Evolution of an English Town by Gordon Home