  Recently, Pello et al. (2004) claimed to have discovered a galaxy at a
redshift z=10, and identified a feature in its spectrum with a hydrogen
Lyman-alpha emission line. If this identification is correct, we show that the
intergalactic medium (IGM) around the galaxy must be significantly ionized;
otherwise, the damping wing of Lyman-alpha absorption by the neutral IGM would
have greatly suppressed the emission line. We find either that the large-scale
region surrounding this galaxy must have been largely reionized by z=10 (with a
neutral fraction <0.4) or that the stars within the galaxy must be massive
(>100 solar masses), and hence capable of producing a sufficiently large HII
region around it. We generalize these conclusions and derive the maximum
Lyman-alpha line flux for a given UV continuum flux of galaxies prior to the
epoch of reionization.
