The_Mayflower_11_Plymouth_5043_oiling_round The locomotive's fireman 
attends to the oiling-round of the inside valve gear and cylinders of 
No.5043 Earl of Mount Edgcumbe. Castle Class cylinders have a 16.5 inch 
diameter and 26 inch piston stroke; the diving wheels are 6 feet, eight 
and a half inches in diameter. roger.griffiths@hotmail.com