1900 Census Furguson David 52 Male Cana CO Rio Blanco Coal Crk Ferguson Thomas 24 Male In CO Rio Blanco Coal Crk 1910 Census Ferguson Frank 27 Male Irel CO Rio Blanco 4-Pct Ferguson David D 58 Male Cana CO Rio Blanco Coal Crk 5-Pct 1920 Census Ferguson Thomas E 52 Male In CO Rio Blanco Buford