  We have modelled diffuse far-ultraviolet spectrum observed by FUSE near M42
as scattering of starlight from the Trapezium stars by dust in front of the
nebula. The dust grains are known to be anomalous in Orion with Rv = 5.5 and
these are the first measurements of the FUV optical properties of the grains
outside of ``normal'' Milky Way dust. We find an albedo varying from 0.3 $\pm$
0.1 at 912 \AA to 0.5 $\pm$ 0.2 at 1020 \AA which is consistent with
theoretical predictions.
