Autograph Letter Signed, thanking his correspondent for offering to assist Wackerbarth “with your knowledge of Teutonic Antiquity”, but pleading an “extreme depression of spirits which the events of the last few years of my life have produced”. 1 page 6 x 4 inches, with a few lines and signature overleaf, integral blank leaf. 10 Staple Inn, London, 19 December 1843. Francis Diedrich Wackerbarth (1813-1884), scholar, linguist, astronomer (at the Astronomical Observatory, Uppsala, Sweden). He assumed the name Athanasius after his secession to the Roman Church.