Cicero, Letters to Atticus
12.15 (March 9, 45 BC, after the death of his daughter; tr. E.O. Winstedt):
In this solitude I don't speak to a soul. In the morning I hide myself in a dense and wild wood, and I don't come out till the evening. After you I have not a greater friend than solitude. In it my only converse is with books.
in hac solitudine careo omnium colloquio, cumque mane me in silvam abstrusi densam et asperam, non exeo inde ante vesperum. secundum te nihil est mihi amicius solitudine. in ea mihi omnis sermo est cum litteris.