During his walk, his mind had been occupied with the fiction of an advantageous opening for him abroad, only requiring a sum of ready money, which, on being communicated to Deronda in private, might immediately draw from him a question as to the amount of the required sum: and it was this part of his forecast that Lapidoth found the most debatable, there being a danger in asking too much, and a prospective regret in asking too little. 
During his walk, he had been creating a fiction about an advantageous opening for him abroad, only requiring a sum of ready money, which Deronda might supply. 