Louise,
Thank you for that clarification. I do not have a marriage date for John Cullivan and Mary E. but LDS reflects with them a child, Mary Elizabeth Chadd 1855 Daviess IN, died 17 APR 1894. You appear to be saying she was the child of the wife and not of this union. The marriage of Powell Chadd was later.
I do have a Hiram B. Powell bn abt 1848 IN, who died 29 NOV 1869 IN marriage 29 NOV 1869, reflecting this wife Mary Elizabeth Chadd born 1855 Daviess IN who died 17 APR 1894. This Mary Elizabeth Chadd (1855-1894) reflects her parents as John Cullivan and Mary E. and the children you mention as Powells. I will check further into this.
You may email me privately if you wish. I believe we have a connection through Potts/Chaddd.
Cheers1004@yahoo.comThanks