  Photometric redshifts have been calculated for the Hubble Deep Fields. The
redshift distributions of the fields differ; there is a large excess of
galaxies in the HDF-North in the redshift range 0.4<z<1.2. The difference is
consistent with the presence of a weak cluster in the HDFN and is only slightly
larger than the cosmic variance in other fields of similar depths and with
models of large scale structure.
