I have letters that were written by Witte family members.Here are the dates and some information.If this is something that will help you with your research please let me know.They are written in German and I have translated the last one.I can post that if there is an intrest.
May 20, 1858 addressed to Philipp Witte, Richmond, Indiana from Philipp Witte, Steinbeck
September 25, 1859 addressed to my son and daughter from Bernhard Philipp Witte, Steinbeck
March 15, 1860 addressed to the kids from Bernhard Witte, Steinbeck
April 9, 1872 addressed to the kids from Bernhard Philipp Witte, Steinbeck
February 1874 addressed to the kids from Bernard Philipp Witte, Recke
June 20, 1923 addressed to Georg Helmes, Elberfeld from Toni Witte, aboard the Norddeutscher Lloyd Bremen
July 6, 1923 addressed to Georg Helmes, Elberfeld from Louisa F. Witte, 323 South 5th St., Richmond, Indiana