According to Professor Barlow's research, apart from keeping out thieves and bandits, perhaps it was because at that time the company still provided food and temporary lodging to new immigrants; after the passing of the Chinese Exclusion Act, the house was built especially strong to prevent immigration officers and law enforcers from entering to arrest people.
據鮑羅教授研究，除了要防止劫匪入侵之外，可能在當時還提供新移民暫時食宿的服務；又為了在「排華法案」通過後，避免移民局和司法人員進入抓人，而蓋得異常堅固。