And this particular obligation I have to this treatise of his, that it was the occasion of my first coming acquainted with him; for it was showed to me long before I had the good fortune to know him; and the first knowledge of his name, proving the first cause and foundation of a friendship, which we afterwards improved and maintained, so long as God was pleased to continue us together, so perfect, inviolate, and entire, that certainly the like is hardly to be found in story, and amongst the men of this age, there is no sign nor trace of any such thing in use; so much concurrence is required to the building of such a one, that ‘tis much, if fortune bring it but once to pass in three ages.