If only Dickens had a cell phone.

While on tour in the U.S., the British author asked to see the site of the infamous Parkman murder. There, in a med school building since razed for the construction of Mass General, a chemist murdered and dismembered a Brahmin doc over a debt.

A Cambridge-based company called UnTour Media has produced a great, mobile tour of sites linked the infamous 1849 Parkman murder. The tour was inspired by a PBS special on the case.