He was to stay the night and ride back next day.

Stephen, on hearing of the arrangement, so contrived matters that Master Everard, the son of a banker who had recently purchased an estate in the neighbourhood, was asked to come to play with her on the day when Harold left.

It was holiday time at Eton, and he was at home.

Stephen did not mention to Harold the fact of his coming; it was only from a chance allusion of Mrs.Jarrold before he went that he inferred it.

He did not think the matter of sufficient importance to wonder why Stephen, who generally told him everything, had not mentioned this.
During their play, Stephen, after pledging him to secrecy, told Leonard of her intention of visiting the crypt, and asked him to help her in it.
This was an adventure, and as such commended itself to the schoolboy heart.