Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_73399 ( "District" text, "Vacator" text, "Reason for change" text, "Successor" text, "Date successor seated" text )

### Question ###
How many vacators have October 22, 1808 as date successor seated?

### Accurate SQL ###

SELECT COUNT("Vacator") FROM table_73399 WHERE "Date successor seated" = 'October 22, 1808'