More on operations 1811-1813:
Gerbrand Bruining. Déscription succincte, mais complette, de l'état actuel de La Haye, et de ses environs. 1816. :
https://books.google.com/books?id=EWNfAAAAcAAJ
“La Fonderie de Canons” : pp. 228-236: https://books.google.com/books?id=EWNfAAAAcAAJ&pg=PA228
Re: pieces de 48 cast at La Haye:
Correspondance générale - Tome 28: 1 avril 1811 - 6 novembre 1811:
https://books.google.com/books?id=gs1EAQAAMAAJ&pg=PA495
https://books.google.com/books?id=gs1EAQAAMAAJ&pg=PA620
"Nieuwe Uitleg":
https://books.google.com/books?id=6a86AAAAcAAJ&pg=PA79
“Canon de 48" La Haye:
https://books.google.com/books?id=21gydmZfUv4C&pg=PA200