Question: Who were the successors when the date the successors were installed was February 23, 1870?
SQL: SELECT "Successor" FROM "1-2417345-3" WHERE "Date of successors formal installation" = 'February 23, 1870';

Question: Who was the vacator when the successor was formally installed on February 1, 1871?
SQL: SELECT "Vacator" FROM "1-2417345-3" WHERE "Date of successors formal installation" = 'February 1, 1871';

Question: Who was the successor that was formally installed on March 30, 1870?
SQL: SELECT "Successor" FROM "1-2417345-3" WHERE "Date of successors formal installation" = 'March 30, 1870';