Sen. Thomas H. Hicks caused a change of staff on March 9, 1865.
[['Maryland (3)', 'SUCCESSOR', 'John Creswell (UU)'], ['John Creswell (UU)', 'DATE_OF_SUCCESSORS_FORMAL_INSTALLATION', 'March 9, 1865'], ['Vacant', 'REASON_FOR_CHANGE', 'Sen. Thomas H. Hicks died during previous congress'], ['Maryland (3)', 'VACATOR', 'Vacant']]