Rich Wareham (https://www.richwareham.com/)
will give a talk on his compiler for the B programming language,
written in Python. If you want to take a look before the talk, the
repository is at https://github.com/rjw57/rbc
B was the predecessor language to C, in part inspired by BCPL. We don't know of an existing compiler for it, and indeed some research was required to even come up with a good definition of the language.
Please note that we are also now on meetup.com, at http://www.meetup.com/CamPUG/.
If possible, please RSVP there for meetings so we have an idea of
numbers. As an incentive, there's more detail about each meeting
there.