Foto: Letter from September 18, 1858 from Sansibar.
Letters to the family (German only):
- London, July 27, 1844
- London, May 10, 1845
- Islington, June 3, 1845
- London, October 8, 1845
- On board of the ship Arrow, April 13, 1846
- Kisuludini, October 1, 1853
- Kisuludini, April 21, 1854
- Kisuludini, September 19, 1854
- Cairo, November 30, 1855
- Zanzibar, September 18, 1858
- Mombas, September 20, 1859
- Mombas, September 20, 1860
- Mombas, May 2, 1861
- Mombas, September 20, 1861
- Mombas, October 2, 1862
- Mombas, September 21, 1863
- Mombas, April 27, 1864
- Mombas, May 4, 1865
- Mombas, September 26, 1866
- Mombas, November 23, 1869
- Mombas, September 21, 1871
- Kisuludini, August 20, 1874
- Kisuludini, August 21, 1874
- Islington, May 12, 1875
Correspondence with other missionaries:
- Mombas, April 29, 1864 to brother Gundert
- Zanzibar, March 22, 1853 from Hamerton - German / English
Letters to the Church Mission Society (CMS) in London:
- Capetown, April 21, 1846 - German / English
- Sansibar, June 4, 1846 - German / English
- Mombas, June 27, 1846 - German / English
- Rabbai, June 22, 1848 - German / English
- Mombas, July 3, 1849 - German / English
- Cairo, December 4, 1851 - German / English
- Masalla, February 23, 1852 - German / English
- NEW: Kisuludini, April 21, 1852 - English
- Mombas, October 6, 1852 - German / English
- Kisuludini, March 29, 1853 - German / English
- Kisuludini, April 4, 1853 - German / English
- Kisuludini, September 15, 1853 - German / English
- Kisuludini, January 2, 1854 - German / English
- Kisuludini, April, 15, 1854 - German / English
- Kisuludini, November 25, 1854 - German / English
10 years of missionary work in East Africa - Kisuludini, den 27. November 1854 - German / English
- Mombas, January 15, 1855 - German / English
- Mombas, April 18, 1855 - German / English
- Cairo, November 18, 1855 - German / English
- Cairo, November 27, 1855 - German / English
- Cairo, December 21, 1855 - German / English
- Aden, January 23, 1856 - German / English
- Kisuludini, April 28, 1856 - German / English
- Mombas, December 18, 1856 - German / English
- Mombas, December 18, 1856 (Letter Hamerton) - German / English
- Sansibar, March 23, 1857 - German / English
- Mombas, September 16, 1859 - German / English