 He was both author and illustrator of "Every Day in the Country" (1883) and "Animal Studies, Old and New" (1885).In literary society, Weir's close friends included Douglas Jerrold, Henry Mayhew, Albert Smith, and Tom Hood the younger, and Weir knew Thackeray and other eminent literary men.In 1889, Weir wrote "Our Cats and All About Them" describing and illustrating the pedigree varieties of the time.