You may have this info by now. Robert Davison Aikman was a half-brother of my 3rd great-grandfather, John Aikman. Robert was born in 1812 in Columbia Co., PA., th oldest son ofJames Alexander Aikman and 2nd wife, Esther Hutchinson. He married Sarah Ann Finch on 9 Sept 1846 in Clinton Co., Iowa.I believe Sarah was the daughter of James Finch and Sarah Phillips (another of their daughters, Rachel, married into my Albright family). Sarah was born in Trafalger, Ontario, Canada on 1/31/1824 and died 2/12/1905 in Lincoln Center, Audubon Co., Iowa. Robert and Sarah had: James Alexander, Elmera, Ambrose fermin, Mary Antionette, Sarah Josephine, Irema Esther, Ella and Robert Franklin.
I have vital stats on these children and their descendants if you need them.