OLD Chelsea abounds in curious history, and even its churches have had strangely chequered careers. St. Luke's, about which Miss Elphinstone will talk this afternoon, has changed its title once and changed it back again ; it has changed from being a Parish Church to being the Parish Chapel of the Parish Church; and it has a Museum (specifically so called) within its walls—a combination of Circumstances that Miss Elphinstone is probably right in considering unique.