  Optical spectrophotometry and circular spectropolarimetry are presented for
several candidate magnetic white dwarfs that were identified during the
Hamburg/ESO survey for bright QSOs. HE 1211-1707 and HE 1043-0502 are rare
examples of white dwarfs that show neutral helium lines in a high magnetic
field, in these cases ~50 MG and ~800 MG, respectively. The former is also
found to be rotating with a period of ~2 hr. HE 1045-0908 is a hydrogen-line
star at ~20 MG, spinning with a period in the range ~2-4 hr. Attempts at
modeling the limited amount of phase-resolved data that is available suggest
that the field structure departs substantially from a simple centered dipolar
geometry. Two rather cool white dwarfs with unidentified broad absorption
spectral features, HE 0236-2656 and HE 0330-0002, are confirmed to be magnetic.
Line identifications for these stars are not yet possible, but the atmospheres
are probably helium-rich, with spectral features formed by trace compounds of
hydrogen, carbon, and perhaps other metals. HE 0003-5701 and HE 0338-3853 were
proposed by Reimers et al. (1996) alongside two similar objects to be magnetic
DB white dwarfs, with magnetic fields all near 20 MG. However, our observations
show that the first two, and by extension all four, are nonmagnetic white dwarf
+ cool dwarf pairs, deserving of study in their own right as possible close
binaries. Finally, a lack of circular polarisation suggests that HE 0000-3430
and HE 0127-3110 are also nonmagnetic. HE 0000-3430 appears to be a featureless
DC white dwarf over the spectral range observed here, while the sole absorption
line near 5890A in HE 0127-3110 could be either He I 5876A or the Na I D
doublet, but there are difficulties with either interpretation.
