In the cab, Leggett and Eleanor try to work out where her husband Frank is hiding from clues in the letter he sent to her. Leggett suggests they continue at "Lancey's on Powell ... this place has the best waffles in town".
Then ... But the view through Lancey's window (below) is not Powell Street - it's Market Street! Clearly visible are Gensler-Lee Diamonds at 818 Market and the Moss women's clothing store at 816 Market. The street view is a rear projection used on the studio soundstage where the scene was filmed which means the virtual address of Lancey's is the Pacific Building on the south side of the street, at 801 Market, corner of 4th, which today houses the Old Navy Store.
... and Now, California Savings occupies the building those stores were in.
... and Now, the camera that filmed Lancey's window view was set up in front of the Pacific Building below.
Leggett mentions his nickname is 'Dannyboy' as he lights Eleanor's cigarette. But take a closer look at that lighter - it's the same one used in the opening scene by the killer. She doesn't know it yet, but we all now know the killer's identity.