  We report the discovery of quasi-periodic oscillations (QPOs) at roughly 187
Hz and 150 Hz in the X-ray intensity of X-ray nova XTE J1859+226. The source
was observed during a recent outburst with RXTE. Besides these high-frequency
QPOs, we have also detected QPOs (and sometimes their harmonics) at 6--7 Hz,
and significant broad-band variability at low frequencies. These properties, as
well as the observed hard X-ray spectrum, make XTE J1859+226 a black hole
candidate (BHC).
  The detection of QPOs at two distinct frequencies $\gtrsim 100$ Hz in two
observations separated by about 4 hours provide additional insights into the
high-frequency QPO phenomenon in BHCs. The importance lies in the proposed
interpretations which invariably involve the effects of strong gravity near a
black hole. We compare our results to those of other BHCs, and discuss the
impact of the observational data on the models in a global context.
