If the several breeds are not varieties, and have not proceeded from the rock-pigeon, they must have descended from at least seven or eight aboriginal stocks; for it is impossible to make the present domestic breeds by the crossing of any lesser number:
Arraza ezberdinek, aldakiak ez badira eta haitz-usoarengandik ere ez badatoz, gutxienez zazpi edo zortzi jatorrizko enborretik etorriak izan behar dute, ezinezko baita, horiek baino gutxiago gurutzaturik, egungo etxe-arrazak sortzea;