Cassell's natural history, london, Cassell & Company, Limited, 1896, animals, English Mastiff, Mastiff, nomenclature, animal behavior Canis lupus familiaris, The illustration depicts a large dog standing attentively in profile. Its coat is textured with intricate lines conveying depth and pattern. The dog's head is turned slightly, showcasing a strong jawline and attentive ears. In the background, subtle landscape features hint at a natural setting, possibly a field or grassy area. The overall composition emphasizes the dog's stature and presence, highlighting its role as a loyal companion.