  The CLEO III experiment has recently accumulated a large statistics sample of
4.73 x 10^6 Upsilon(3S) decays. We present the first evidence for the
production of the triplet Upsilon(1D) states in the four-photon cascade,
Upslion(3S) -> gamma chi_b(2P), chi_b(2P) -> gamma Upsilon(1D), Upsilon(1D) ->
gamma chi_b(1P), chi_b(1P) -> gamma Upsilon(1S), followed by the Upsilon(1S)
annihilation to e+ e- or mu+ mu-. The signal has a significance of 9.7 standard
deviations. The measured product branching ratio for these five decays, (3.3 +-
0.6 +- 0.5) x 10^{-5}, is consistent with the theoretical estimates. We see a
6.8 standard deviation signal for a state with a mass of 10162.2 +- 1.6
MeV/c^2, consistent with the Upsilon(1D_2) assignment. We also present improved
measurements of the Upsilon(3S) -> pi0 pi0 Upsilon(1S) branching ratio and the
associated di-pion mass distribution.
