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We have recently observed several gravitationally lensed objects
with SCUBA on the JCMT.  One of them shows very strong submm flux,
comparable to IRAS F10214+4724 and the Cloverleaf Quasar.  The object
is very likely a dusty high redshift infrared galaxy or quasar, but its
redshift has not yet been measured because of an extremely red optical
spectrum.  HST observations in the near-IR reveal a 1" diameter Einstein
Ring.   We wish to obtain a full, broadband spectrum across the IR to
determine this object's spectral energy distribution and possibly get a
rough estimate of its redshift.  This appears to be a member of a rare
class of observable high-redshift IR-galaxies/quasars which warrants
follow-up with ISO before the mission ends.