  A new analysis of the Lunar Prospector epithermal neutron data is presented,
providing an improved map of the distribution of hydrogen near to the lunar
poles. This is achieved using a specially developed pixon image reconstruction
algorithm to deconvolve the instrumental response of the Lunar Prospector's
neutron spectrometer from the observed data, while simultaneously suppressing
the statistical noise. The results show that these data alone require the
hydrogen to be concentrated into the cold traps at up to 1 wt% water-equivalent
hydrogen. This combination of localisation and high concentration suggests that
the hydrogen is present either in the form of a volatile compound or as solar
wind protons implanted into small regolith grains.
