The recently developed TULIP methodology for determining Initial lead, based on the measured Pb isotopic compositions of rocks, was applied to four terrestrial terrains, and the results are shown and discussed in this report. Particular emphasis was given to the determination of initial Pb of the South Of Isua (SOI) terrain, because of the availability of a large high-quality database on its rocks and feldspar separates. The initial Pb results for SOI, are: Pb-206/Pb-204 = 11.088 +/- 0.024, Pb-207/Pb-204 = 12.983 +/- 0.002, and Pb-208/Pb-204 = 31.196 +/- 0.014. Initial Pb was also precisely determined for the Beartooth Mountains, and the results are: 206/204 = 13.571 +/- 0.071, 207/204 = 14.891 +/- 0.003, and 208/204 = 32.41 +/- 0.08. These results demonstrate the feasibility of routine determination of initial Pb by the developed methodology, once large databases for the terrains are established. Extending the methodology to terrains of other planets should be possible.