about midnight
`` She meant to meet you there , I 'm sure , but I 'm also sure she changed her mind about that , when she learned of my advent . However , we 'll keep your promise . '' Acting at his instructions , I went with him over to Vicky Van 's . It was about midnight , and as he had the address book with him , he kept possession of it . We went in the house , and in the dark , felt our way up to the music room . Stone put the book in the jar , and motioned for me to hide behind a sofa . He himself took up his vigil behind a window-curtain , of heavy brocade .