Brief an Doctor F. G. Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 17.12.1808 [17t. Decemb. 1808]Brief an Doctor Wölker [Friedrich Gottlieb Welcker] in Darmstadt
Rom, 17.07.1808 [17 Juli 1808]Brief an Herrn Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 01.07.1809 [1 Juli 1809]Brief an "Mio Bene" [Friedrich Gottlieb Welcker]
Rom, 01.1808 [im Januar 1808]Brief an Professor Dr. Welker in Gießen
Rom, 18.01.1812 [18. Januar 1812]Brief an Professor F. G. Welker in Bonn
Rom, 10.05.1847 [10. May 1847]Brief an Professor Welker in Bonn
Rom, 27.12.1843 [27 December 1843]Brief an Professor Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 08.12.1809 [8 December [180]9]Brief an Professor Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 13.07.1811 [13 Juli 1811]Brief an Professor Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 28.08.1811 [28 August 1811]Brief an Professor Wölker [Friedrich Gottlieb Welcker] in Gießen
Rom, 25.07.1810 [25 Juli 1810]Brief an Professore Welker a Bonn
Rom, 24.05.1826 [24 May 1826]