  We present 2-degree field spectroscopic observations of a sample of 96 A-type
stars selected from the Sloan Digital Sky Survey Data Release 3 (SDSS DR3). Our
aim is to identify blue horizontal branch (BHB) stars in order to measure the
kinematic properties of the tidal tails of the Sagittarius dwarf spheroidal
galaxy. We confine our attention to the 44 classifiable stars with spectra of
signal-to-noise ratio >15 per angstrom. Classification produces a sample of 29
BHB stars at distances 5-47 kpc from the Sun. We split our sample into three
bins based on their distance. We find 10 of the 12 stars at 14-25 kpc appear to
have coherent, smoothly varying radial velocities which are plausibly
associated with old debris in the Sagittarius tidal stream. Further
observations along the orbit and at greater distances are required to trace the
full extent of this structure on the sky. Three of our BHB stars in the
direction of the globular cluster Palomar (Pal) 5 appear to be in an
overdensity but are in the foreground of Pal 5. More observations are required
around this overdensity to establish any relation to Pal 5 and/or the Sgr
stream. We emphasize observations of BHB stars have unlimited potential for
providing accurate velocity and distance information in old distant halo
streams and globular clusters alike. The next generation multi-object
spectrographs provide an excellent opportunity to accurately trace the full
extent of such structures.
