I had had now neglected my promise for some time
Since Victor and Clerval had not left London until the end of March, and
as they had "passed a considerable period at Oxford" and "two months in
Cumberland and Westmoreland," not to mention the time spent in this
lengthy journey northward, it should now be early in July, which is to
say, almost a year after Victor's promise to his Creature. His pattern of
attenuated delays throughout the novel is particularized
in an earlier note.