  We describe in some detail a computer evaluation of a 't Hooft vertex in a
two dimensional model using the overlap. The computer result agrees with the
known exact continuum value, and in this sense our work is a first successful
fully dynamical simulation of a chiral gauge theory on the lattice. We add some
new data to numbers obtained earlier and provide a selfcontained description
which should make it easy for others to reproduce and follow up on our work.
