Those that have exalted their thoughts above the minuter parts of the creation, who have observed the motions of the heavenly bodies, and attempted systems of the universe, have not been denied the honour which they deserved by so great an attempt, whatever has been their success.  Nor have those mathematicians been rejected, who have applied their science to the common purposes of life; or those that have deviated into the kindred arts of tacticks, architecture, and fortification.

Even arts of far less importance have found their authors, nor have these authors been despised by the boundless curiosity of the proprietors of the Harleian library.  The writers on horsemanship and fencing are more numerous and more bulky than could be expected by those who reflect, how seldom those excel in either, whom their education has qualified to compose books.

The admirer of Greek and Roman literature will meet, in this collection, with editions little known to the most inquisitive criticks, and which have escaped the observation of those whose great employment has been the collation of copies; nor will he find only the most ancient editions of Faustus, Jenson, Spira, Sweynheim and Pannartz, but the most accurate, likewise, and beautiful of Colinaeus, the Juntae, Plantin, Aldus, the Stephens, and Elzevir, with the commentaries and observations of the most learned editors.

Nor are they accompanied only with the illustrations of those who have confined their attempts to particular writers, but of those, likewise, who have treated on any part of the Greek or Roman antiquities, their laws, their customs, their dress, their buildings, their wars, their revenues, or the rites and ceremonies of their worship, and those that have endeavoured to explain any of their authors from their statues or their coins.

Next to the ancients, those writers deserve to be mentioned, who, at the restoration of literature, imitated their language and their style with so great success, or who laboured with so much industry to make them understood:  such were Philelphus and Politian, Scaliger and Buchanan, and the poets of the age of Leo the tenth; these are, likewise, to be found in this library, together with the Deliciae, or collections of all nations.

Painting is so nearly allied to poetry, that it cannot be wondered that those who have so much esteemed the one, have paid an equal regard to the other; and, therefore, it may be easily imagined, that the collection of prints is numerous in an uncommon degree; but, surely, the expectation of every man will be exceeded, when he is informed that there are more than forty thousand engraven from Raphael, Titian, Guido, the Carraccis, and a thousand others, by Nanteuil, Hollar, Callet, Edelinck, and Dorigny, and other engravers of equal reputation.

Their is also a great collection of original drawings, of which three seem to deserve a particular mention:  the first exhibits a representation of the inside of St. Peter’s church at Rome; the second, of that of St. John Lateran; and the third, of the high altar of St. Ignatius; all painted with the utmost accuracy, in their proper colours.