Mr. Molina, 58, a lifelong New Yorker and a sanitation worker since 1981, began collecting pictures and trinkets along his route about 20 years ago, he said, to brighten up his corner of the garage locker room. Gradually, his colleagues on East 99th Street began to contribute, gathering up discarded gems they thought he might enjoy. As the collection grew, word spread, and workers from other boroughs started to drop off contributions from time to time. Next, building superintendents along Mr. Molina’s route started putting things aside they thought he could use.