Mezue ahịrịokwu na-esonụ: Talley buru ụzọ banye n'ọrụ agha dịka onye ọrụ nchekwa na United States Army Coast Artillery Corps n'etiti afọ ndị 1920. Ọ sonyere ndị agha United States na June 1926. Dị ka onye nke abụọ, Talley nọ na Battalion nke abụọ nke Injinia na Texas na Colorado tupu ịga ụlọ akwụkwọ Injinia na Virginia. Mgbe ahụ, o tinyere aka na Nnyocha Ọwa Mmiri Nicaragua ma nyere aka na nsogbu nke Nicaragua.
Ala ọma jijiji e nwere na Nikaragụa n'afọ 1931 E kenyere Talley ịgbanyụ ọkụ ahụ sochiri ala ọma jijiji ahụ mere na Managua. Mgbe Talley laghachiri United States, ọ rụrụ ọrụ imepụta map ndị dabeere na foto ndị e si n'elu igwe were mee ruo afọ itoolu, na-ebipụta akwụkwọ ọgụgụ "Photogrammetry". Ọ mepụtakwara 'ihe a na-ebugharị ebugharị' ma na-akụzi ihe na Mahadum Harvard. Ọ bụ onye isi ndị ọrụ nke ngalaba injinia nke dị na Portland, Oregon.