Final answer:
The watercolor 'The Adirondack Guide' was painted by nineteenth-century American artist Winslow Homer, known for his landscapes and seascapes.
Step-by-step explanation:
The watercolor painting entitled The Adirondack Guide was created by the artist Winslow Homer. Winslow Homer is renowned for his depiction of American landscapes and seascapes, often painting scenes that capture the battle between man and the natural elements. His work with watercolors, alongside his use of oil paints, has cemented his status as one of the great American painters of the nineteenth century, with a particular focus on his dynamic seascapes and depictions of man's relation to the ocean.