One of the earliest publications to document the 'Indian' dogs of North America was an article by Glover Morrill Allen, in 1920. Allen postulated that these 'Larger or Common Indian Dogs' were descended from Asian primitive dogs: The probability therefore is, that the Domestic Dog originated in Asia and was carried by ancient peoples both east and west into all parts of the inhabited world. That this migration began in late Pleistocene times seems highly probable. Allen cites late nineteenth-century studies of skeletal remains of dogs that could be found from Alaska to Florida to the Greater Antilles and westward to the Great Plains, and were excavated from Indian mounds as well:
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