This is a pretty cool site about the social history of Mylapore.
Mylapore is really old (dating back to atleast the 1 st Century CE). It is associated with Thiruvalluvar (the author of the Thirukkural), St. Thomas (one of the 12 apostles), is supposed to have preached here.
This particular site doesn't quite reach back that far, but has information starting from the turn of the 20th century. Pretty fascinating stuff.