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_name_2 (district VARCHAR, incumbent VARCHAR, first_elected VARCHAR, result VARCHAR)

### Question ###
Which District has a First elected of 1858, and a Result of retired republican gain, and an Incumbent of william millward?

### Accurate SQL ###

SELECT district FROM table_name_2 WHERE first_elected = 1858 AND result = "retired republican gain" AND incumbent = "william millward"