I don't have the dates for Elizabeth and George's marriage (or any other information about her). I assume the marriage took place in Ohio since she was never listed in an Iowa census.
Mary Magdalena Grice (Polly) was born in Maryland ca. Dec. 31,1816.(I have a feeling that this might be a baptismal date?) I don't know her parents names?In census records there were two men named John Grice living the the same area in Stark Co. OH. One of the could be her father?There was also a Catholic priest who had a parish in this same area by the last name of Grice.
Conrad and Mary were married on June 8, 1830, Stark Co., OH.
They moved to Sigourney, Keokuk Co., IA between 1845 and 1847.