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_78 ( round INTEGER, player VARCHAR, pick VARCHAR, position VARCHAR )

### Question ###
What is the highest round of Ed Smith, who had a pick higher than 261 and played halfback?

### Accurate SQL ###

SELECT MAX(round) FROM table_name_78 WHERE pick < 261 AND position = "halfback" AND player = "ed smith"