He then became a freelance natural history writer, publishing over a thousand articles and books, including "A Natural History of Quadrupeds and other Mammiferous Animals" (1841), "The History of the Dog" (1845), "The History of the Horse" (1845) and "Pictorial Museum of Animated Nature" (1848-9).
Мартин написал более тысячи sex статей и книг, включая:* "A Natural History of Quadrupeds and other Mammiferous Animals" (1841),* "The History of the Dog" (1845),* "The History of the Horse" (1845),* "Pictorial Museum of Animated Nature" (1848—1849),* "Cattle: their breeds, management and diseases" (1853),* "Our Domestic Fowls".