  The source catalogue for the LBQS and the FIRST Survey are compared in their
regions of overlap. In the 270 deg^2 common to both surveys the LBQS contains
\~100,000 stellar and ~40,000 non-stellar objects, while the FIRST catalogue
contains ~25,000 sources. Cross-correlation of these lists yields 67 positional
coincidences between known LBQS quasars and FIRST sources and an additional 19
stellar and 149 non-stellar positional coincidences with the radio catalogue.
Spectroscopy of all the stellar matches and two-thirds of the non-stellar
matches produces eight new quasars. One BL Lac object, previously misclassified
during the LBQS survey is also identified. The straightforward fractional
incompleteness of the LBQS determined from this sample is 13+/-4%, in good
agreement with the published estimate of 10%. The distributions of the ratio of
radio-to-optical power, apparent magnitude and spectroscopic properties for the
new objects are consistent with those of the 67 LBQS-FIRST objects previously
known. The consistency of the optical and radio properties of the new objects
with those of the known quasars thus supports the conclusion that no new
population of objects, constituting more than ~7% of quasars detected by FIRST,
has eluded the LBQS optical selection techniques. The percentage of
radio-detected quasars in the LBQS catalogue is found to be 12+/-2%,
considerably smaller than the value of 25% advocated by White et al. (2000)
based on the FBQS. Apparent differences in the form of the number-redshift
relation for the LBQS and FBQS samples are shown to arise in large part from
the very different optical passbands employed.
