If you ever read this message, you made a mistake on your original message. Fredrick W. Nicolls' mother was not Rosa Muhlenburg. Rosa died on May 17, 1867. Fredrick was not born until Feb. 7, 1870. Fredrick Nicolls' mother is Anne Hall Muhlenburg, G.A. Nicolls' second wife. Here is where it gets confusing. G.A.Nicolls' first wife Rosa had a brother named Henry Muhlenburg. This Henry Muhlenburg married his cousin Anne Hall Muhlenburg. They produced one child - Henry Muhlenburg. Rosa's brother (Henry Muhlenburg) died on Jan 9, 1854. G.A. Nicolls' first wife Rosa died on May 15, 1867. On Jan 28, 1869 G.A. Nicolls marries Rosa's brother's wife - Anne Hall Muhlenburg. Thus, G.A. Nicolls' becomes the step father of Henry Muhlenburg. Both G.A. Nicolls' wifes (Anne Hall Muhlenburg and Rosa Muhlenburg) share the same grandfather - Rev. Henry E. Muhlenburg.
I hope this sets the record straight. I have alot more information - including family documents. Anyone that wants to discuss the Nicolls family tree please email me at GANicolls@aol.com