Folder with drawings

I left a light brown A2 size folder with masking tape stuck to it on the 145 bus from Stillorgan to Hueston station in Dublin on Wednesday 16th February at about 9.30 am. I left it on the luggage rack of the bus. Inside the folder were secondary students' drawings. I've tried the bus depot a few times but there has been no sign. I would really appreciate its return.