  Theoretical considerations prompted by discovery of the exotic Theta(uudds*)
baryon led us to propose a dynamical picture emphasizing the role of diquark
correlations, which are also useful in elucidating other aspects of low-energy
QCD. A notable prediction of this picture is the existence of new exotic and
non-exotic S=-2 ``cascade'' baryons with specific, characteristic properties.
We argue here that recent observations by the NA49 collaboration are broadly
consistent with our predictions, and propose further tests.
