The average 1.44-ev indium resonance age has been determined from activation measurements for a D(d, n) He3 neutron source in water. The energy of the incident deuteron beam was 250 kev. The source emits neutrons anisotropically with energies from 3.12 Mev at 0° to 2.00 Mev at 180°. The activities were averaged over angle by the Gauss integration procedure using angles of 20.3°, 90°, and 159.7°. The average age, when corrected for the absence of moderator in the duct which brings the deuteron beam into the medium, is 34.6 ± 2.2 cm2. Rigorous theoretical calculations for a D+D neutron source by Zweifel give 33.6 cm2 for 100-kev incident deuterons and 33.8 cm2 for 150-kev deuterons. Any estimate of an age for a 250 kev D+ source would yield a larger value of age and closer agreement with this experiment. The variation of our measured ages versus angle may be understood qualitatively on the basis of effects due to the duct and the anisotropy of the source. A more precise theoretical check of this experiment is expscted when Monte Carlo calculations now in progress for precisely our geometry and source become available.