midnight
Think of the chills and cobwebs . Weigh the probability of his Holiness being devoured by rats . ' '' ` I guarantee his Holiness absolute immunity from cold , ' he replied , ` and that none of my subjects shall molest him either going or returning . ' '' ` But , ' I objected , ` granting that you are not the Devil , how the devil , let me ask , do you expect to gain admittance at midnight to the Appartamento Borgia ? ' '' ` Think you I can not pass through a stone wall ? ' answered he , and vanished in an instant . A tremendous scampering of rats immediately ensued , then all was silence .