 They had two children, William Carter Pecora born in 1949 and Ann Stewart Pecora born in 1953.In 1949, he started a large-scale geologic mapping program of eight fifteen-minute quadrangles in the Bearpaw Mountains.The first four of these maps was published in 1957 as Miscellaneous Geologic Investigation Maps and the other four were published in bulletins starting in 1960 and ending in 1963.