  We consider the classical theory of a gravitational field with spin 2 and
non-vanishing (Pauli-Fierz) mass in flat spacetime, coupled to electromagnetism
and point particles. We establish the law of light propagation and calculate
the amount of deflection in the background of a spherically symmetric
gravitational field. As the mass tends to zero, the deflection is shown to
converge to 3/4 of the value predicted by the massless theory (linearized
General Relativity), even though the spherically symmetric solution of the
gravitational field equations has no regular limit. This confirms an old
argument of van Dam and Veltman on a purely classical level, but also shows its
subtle nature.
