  Applying knowledge of the interaction between heavy quarks derived from the
study of $c\overline{c}$ and $b\overline{b}$ bound states, we calculate the
spectrum of $c\overline{b}$ mesons. We compute transition rates for the
electromagnetic and hadronic cascades that lead from excited states to the
$^1\text{S}_0$ ground state, and briefly consider the prospects for
experimental observation of the spectrum.
