I'm posting this on behalf of a coworker whose cat escaped from her house about a week ago. She's contacted the shelters, posted on TelephonePole.org and Craigslist and posted flyers around her neighborhood.
Her cat, Arthur, accidentally got out on Thursday, December 30. This happened on Groveland Street near the Carmalt school area in Brookline/Overbrook. He is normally an indoor cat, has long gray hair and light green eyes, and is about 12 years old.
Arthur doesn't have a collar and isn't microchipped, but responds to his name. A reward is offered for his safe return.
She put a post up on Craigslist so she can be emailed through there, but I can also put you in touch with her if you have any information about Arthur!