[U.S.]. visit, pay a visit; interchange visits, interchange cards; call at, call upon; leave a card; drop in, look in; look one up, beat up one's quarters.

Yet through all this impersonal interchange love shone out to love like lamplight through the blinds of two opposite closed windows, and every heart-hiding letter bore enough interlinear revealment of mind and character to keep mutual admiration glowing and growing.