Your ggGrandmother was born May 15 1854 as far as my records indicate. Her father Heinrich was born January 17,1817 and died December 29, 1900. Her mother Wilhelmina Wessman was born July 10, 1819 and died April 18, 1907. Your ggGramother had a brother Ludwig Dieke born Aug 20, 1851. There is a research group in Westchester Illinois that is working on collecting information about the Dieke family. I know there is a website with photos of the family and houses that they lived in. I'll try and locate it as soon as I can.