On Tuesday, Kim Ledger, father of actor Heath Ledger, paid a one-hour visit to the Soho loft at 421 Broome St. where his son died of an apparent prescription-drug overdose on Tues., Jan. 22, after having lived there for a few months. Kim Ledger, wearing sunglasses, left the loft with security guards and police detectives and entered a black S.U.V. parked in an alley behind the building. According to some of the paparazzi, the building’s superintendent had moved a portion of the memorial items left outside for Heath Ledger down to the basement, and showed them to the actor’s father there during his visit.