In 1984 why does Winston think of renting Mr. Charrington's room?

Winston has several reasons for renting a room even though he already has Party-provided quarters.  First, the room has no telescreen.  As seen in previous chapters, Winston cringes from Big Brother's constant surveillance of all his doings. He imagines how peaceful the room would be where he could sit and think in private. Secondly, the room features several reminders of the past, and Winston possesses only memory snapshots of what the past was really like. The room's shabbiness and contents cause a sense of nostalgia in the novel's protagonist.  Even though he cannot remember what he thinks is the past, the room provides a pleasant feeling of the past.