Two weeks ago, The Wave published a photo quiz asking readers to identify ten buildings in Rockaway. Last week, we identified the buildings - all of them, with the exception of number nine in the quiz, which even the editors of the paper could not identify. Luckily, our readers came through. Building number nine is really the rear of 1821 Cornaga Avenue in Far Rockaway. Just over its roof, you can see the 101 Precinct house (some thought it was the 100 Precinct). The large apartment houses that tower over the building are the Crossways Apart ments at 1502 Mott Avenue. Directly to the left of the building you can see the gas station that once stood across the street, at the corner of Mott and Cornaga Avenues. Thanks for the help.