Lost brown leather men's messenger bag

Left it in either Solas bar in town or in a taxi. Solas haven't got it in Lost & Found so it could be in a taxi. It has my passport and reporter's notebook in it so I'm natually eager to get it back. Anyone with any information on how to start contacting Dublin taxi numbers, I'd really appreciate it as well. I will start phoning companies but if anyone has been in a similar situation with a lost item in a taxi I'd love any hints on where to start. Thanks!