  Very recently Harada has proposed a gravitational theory which is of third
order in the derivatives of the metric tensor with the property that any
solution of Einstein's field equations (EFEs) possibly with a cosmological
constant is necessarily a solution of the new theory. Remarkably he showed that
even in a matter-dominated universe with zero cosmological constant, there is a
late-time transition from decelerating to accelerating expansion. Harada also
derived an exact solution which is generalisation of the Schwarzschild
solution. However, this was not the most general static spherically vacuum
solution of the theory and the general solution was subsequently obtained by
Barnes.
  Recently Tarciso et al. have considered regular black holes in Harada's
theory coupled to non-linear electrodynamics and scalar fields. In particular
they exhibit a four-parameter solution with a zero scalar field whose source is
a Maxwell electromagnetic field. It is a straightforward generalisation of
Harada's vacuum solution analagous to the Reissner-Nordstrom generalistaion of
the Schwarzschild solution. However, this solution is not the most general
static spherically symmetric solution of the Harada-Maxwell field equations
(i.e.\ Harada gravitational fields with a Maxwell electromagnetic source). The
most general such solution is obtained in this paper.
