  In an ongoing programme to identify a sample of high z DLA galaxies we have
found the long sought for case of a Ly-alpha emitter seen in the centre of a
broad DLA trough. This is the predicted `textbook case' of an intervening DLA
galaxy if DLA galaxies are small, but would not be expected if intervening high
redshift DLA galaxies have large gaseous disks. The Ly-alpha flux is
5.4{+2}{-0.8} * 1e-17 ergs/s/cm2 similar to what has been found in previously
known high z DLA galaxies. The impact parameter is found to be 0.3+-0.3 arcsec.
This is smaller than what was found in previous cases but still consistent with
random sight-lines through absorbers with mean impact parameter ~1 arcsec. Of
the 24 DLAs targeted in the NICMOS imaging survey five have now been identified
as Ly-alpha emitters. The DLA galaxies with detected Ly-alpha emission tend to
have higher interstellar metallicities than those with undetected Ly-alpha
emission. This is plausibly explained as a consequence of a positive
correlation between the Ly-alpha line luminosities of the galaxies and their
metallicities, although the present sample is too small for a definitive
conclusion. The available observations of high-redshift DLA galaxies are also
consistent with a negative correlation between Ly-alpha equivalent widths and
metallicities, as seen in nearby star-forming galaxies and usually attributed
to the preferential absorption of Ly-alpha photons by dust grains.
