You should perhaps have a look to Marshall's correspondence (Whitaker ed. 
1996) 
- Letters on the campaign for economic tripos :  Vol. 2, pp. 314-5; 348-9; 
357-62 
- Letters on the Moral Science Tripos reform : Vol. 2, pp. 134-5, 140, 
177-9, 186 
 
Rozenn MARTINOIA