Jacob Hamman is a direct ancestor of mine. All my notes are at http://www.PhyllisAndGlen.orghttp://www.PhyllisAndGlen.org, look under Sarah A Hammond and then click the link on "Notes on finding ancestry of Sarah Hammond".According to the death certificate of Jacob's daughter, Sarah, Jacob was born in Pennsylvania.
Here is Jacob's census entry in 1870:
1870 Kansas Census. Bourbon County. Page 494. Hamman, Jacob 53 MW Farm Laborer PA Esther 53 FW Housekeeper Ind. Sarah 16 FW House... Ind. Jesmia 14 FW At Home Kan. Janette 11 FW At Home Kan.
Please contact me with what you have! Best regards, Mark Hicks