  We present a Keck ESI spectrum of FIRST 074711.2+273904, a K=15.4 quasar with
redshift 4.11 that is detected by both FIRST and 2MASS. The spectrum contains
at least 14 independent C IV absorption systems longward of the Ly-alpha
forest. These systems are found over a path length of Delta z = 0.984,
constituting one of the highest densities per unit redshift of C IV absorption
ever observed. One of the C IV systems is trough-like and resembles a weak
BAL-type outflow. Two of the C IV are ``associated'' absorption systems with
|v|<3000 km/s. Of the 11 remaining systems with v>3000 km/s, eight are either
resolved or require multiple discrete systems to fit the line profiles. In
addition to C IV absorption, there are two low-ionization Mg II absorption
systems along with two damped Ly-alpha systems, at least one of which may be a
C IV system. The overdensity of C IV absorption spans a redshift range of Delta
z=1. Superclusters along the line of sight are unlikely to cause an overdensity
stretching over such a long redshift path, thus the absorption may be an
example of narrow, high-velocity, intrinsic absorption that originates from the
quasar. We suggest that this quasar is a member of a transitional class of BAL
quasars where we are just barely seeing the spatial, density, or temporal edge
of the BAL-producing region (or period); the multiple high-velocity absorption
systems may be the remnants (or precursors) of a stronger BAL outflow. If
correct, then some simpler absorption line complexes in other quasars may also
be due to outflowing rather than intervening material.
