  I study the relationship between the spatial distribution of intergalactic
metals and the masses and ejection energies of the sources that produced them.
Over a wide range of models, metal enrichment is dominated by the smallest
efficient sources, as the enriched volume scales roughly as E^{3/5} ~ M^{3/5}
while the number density of sources goes as 1/M. In all cases, the earliest
sources have the biggest impact, because fixed comoving distances correspond to
smaller physical distances at higher redshifts. This means that most of the
enriched volume is found around rare peaks, and intergalactic metals are
naturally highly clustered. Furthermore, this clustering is so strong as to
lead to a large overlap between individual bubbles. Thus the typical radius of
enriched z ~ 3 regions should be interpreted as a constraint on groupings of
sources rather than the ejection radius of a typical source. Similarly, the
clustering of enriched regions should be taken as a measurement of source bias
rather than mass.
