We propose to obtain broad-band photometry with ISOPHOT for the
z=2.76 radio galaxy MG1019+0535 (Dey et al 1994).  We strongly suspect
this galaxy to be dusty because the strength of its narrow Lyman-alpha
emission line is far below normal compared to the strengths of the HeII
and CIII] emission lines.  We wish to determine the mass of cool dust
and the gas-to-dust ratio in this high redshift galaxy by ISO photometry
at 60, 90 and 160 microns (observer's frame).  This galaxy provides a unique
opportunity to quantitatively examine the dust emission from a luminous
galaxy where Lyman-alpha is weakened by the combination of resonance line
scattering and dust absorption, and to study the properties of dust in
the early universe.