  We consider the $XYZ$ chain model of arbitrary spin $S$ in the high
temperature region, with external magnetic field and single-ion anisotropy
term. Our high-temperature expansion of the Helmholtz free energy is analytic
in the parameters of the model for $S$, which may range from 1/2 to the
classical limit of infinite spin ($S\to \infty$). Our expansion is carried out
up to order $(J \beta)^5$. Our results agree with numerical results of the
specific heat per site for $S=1/2$, obtained by the Bethe ansatz, with $h=0$
and D=0. Finally, we show that the magnetic susceptibility and magnetization of
the quantum model can be well approximated by their classical analog in this
region of temperature.
