hi guys,i have done something very silly and wondered if you could help,here goes

whilst removing the cylinder head on my bt escos i have accidentley dropped the torque bit down the hole which is at the back of the head, on removal of the head i discovered or assume it has fallen all the way down the hole to the back left of the block (the slightly larger one next to the two square water ways) what is this hole and/or where will the torque bit be found and whats the best way to do this cheers guys. any help appreciated as i want to be ready for ford fair