  We present an analysis of high-resolution HI data of one of the cores of
HVC187 Wakker & van Woerden 1991), HVC287+22+240. Structure is present down to
the lowest-measurable scale (~1 arcmin) and several concentrations appear to be
unresolved. Most of the cores seen at low resolution break up into smaller
subcores at higher resolution. The typical volume density and pressure are
estimated to be ~30/R/D(kpc) cm^{-3} and ~18000/R/D(kpc) K cm^{-3},
respectively, where R is the resolution in arcmin and D(kpc) the unknown
distance in kpc.
