The experimentally measured value of 14-MeV neutron multiplication for 10-cm-thick lead in rectangular geometry agrees within 1% of the corresponding calculated value using the MORSE-E code with the Los Alamos National Laboratory 30-group cross-section set CLAW-IV, in P3 scattering approximation. This result is in direct contrast with Takahashi's measurements with lead spheres of 3-, 6-, 9-, and 12-cm radii, where the measured multiplication values are found to be ˜15% higher than the corresponding transport calculations performed using the ANISN and NITRAN codes with the ENDF/B-IV library. However, Monte Carlo calculations using the MORSE-E code with the CLAW-IV library, as well as those of Cheng et al, using the MCNP code with the ENDF/B-V library, agree very well with Takahashi's measurements. Thus, the real difference of leakage neutron multiplication in lead is not between the measurements and the calculations, as reported by Takahashi, but between Takahashi's and other calculations. It is found that by using lead as a neutron multiplier in practical fusion blankets, a 5 to 10% higher neutron multiplication can be obtained than with beryllium for identical configurations of the multiplier.