  We examine the decay modes $\eta/\etp\ra \pi^+ \pi^- \gamma$ within the
context of the Hidden Local Symmetry (HLS) Model. Using numerical information
derived in previous fits to $VP\gamma$ and $Ve^+e^-$ decay modes in isolation
and the $\rho$ lineshape determined in a previous fit to the pion form factor,
we show that all aspects of these decays can be predicted with fair accuracy.
Freeing some parameters does not improve the picture. This is interpreted as a
strong evidence in favor of the box anomaly in the $\eta/\etp$ decays, which
occurs at precisely the level expected. We also construct the set of equations
defining the amplitudes for $\eta/\etp\ra \pi^+ \pi^- \gamma$ and $ \eta/\etp
\ra \ggam $ at the chiral limit, as predicted from the anomalous HLS Lagrangian
appropriately broken. This provides a set of four equations depending on only
one parameter, instead of three for the traditional set. This is also shown to
match the (two--angle, two--decay--constant) $\eta-\etp$ mixing scheme recently
proposed and is also fairly well fulfilled by the data. The information
returned from fits also matches expectations from previously published fits to
the $VP\gamma$ decay modes in isolation.
