This illustration depicts a grand, multi-storied Victorian house situated on the edge of a rocky shoreline. The house features intricate architectural details, including tall, arched windows, a prominent central turret topped with a spire, and a wrap-around porch. The structure is rendered in a clean, hand-drawn ink style with subtle watercolor washes, giving it a whimsical yet slightly mysterious quality.
The setting is a peaceful, secluded waterfront at dusk. In the foreground, tall green grasses grow along a stone-lined bank, with a small portion of a wooden rowboat visible in the lower-left corner. The background consists of a vast, graduated purple sky that transitions from a lighter hue near the horizon to a deeper shade at the top, suggesting the approach of nightfall.
The composition is balanced, with the house serving as the central focal point. White text is overlaid at the top of the image, reading "SECRET OF ROCK ISLAND" and "Story by Matt Christopher." The artistic medium combines pen-and-ink line work with soft watercolor blending, creating a charming and evocative scene that emphasizes the house's isolation and architectural character.