seven o'clock
`` Nothing difficult about that . '' `` It must be given him to-morrow morning as he goes out , and without his father 's knowledge ; do you understand ? '' `` Perfectly . It can be easily done , as M. Louis goes to his studies at seven o'clock , while old Richard leaves only at nine for his writing office . '' `` I may count on you then ? '' said the commander , leaping into the cabriolet . `` Consider it done , monsieur , '' was the reassuring reply .