  We have reprocessed a set of observations of 75 bright, unidentified,
steep-spectrum polarized radio sources taken with the Green Bank 43-m telescope
to find previously undetected sub-millisecond pulsars and radio bursts. The
(null) results of the first search of these data were reported by Schmidt et
al. Our reprocessing searched for single pulses out to a dispersion measure
(DM) of 1000 pc cm$^{-3}$ which were classified using the Deep Learning based
classifier FETCH. We also searched for periodicities at a wider range of DMs
and accelerations. Our search was sensitive to highly accelerated, rapidly
rotating pulsars (including sub-millisecond pulsars) in compact binary systems
as well as to highly-dispersed impulsive signals, such as fast radio bursts. No
pulsars or astrophysical burst signals were found in the reprocessing.
