Boyle, Andrew. <br/><br/>
Trenchard / 
by Andrew Boyle. 
 - London :  Collins,  1962. 
 - 768p.,ill.,24cm. 
<br/><br/> Includes chapters about his work as Commissioner of the Metropolitan Police. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Trenchard, Hugh Montague, 1873-1956