G. E. Lessing's Saemmtliche Schriften, herausgegeben von Karl Lachmann. 1853-57. 12 Baende. "If I write at all, it is not possible for me to write otherwise than just as I think and feel." Lessing to his father, 21st December, 1767. Letter to Klotz, 9th June, 1766. December, 1751, to November, 1752." But we never feel quite sure of his dates.