"The Spirit of Discovery by Sea: A Descriptive and Historical Poem" is a work by William Lisle Bowles. William Lisle Bowles (1762-1850) was an English poet and clergyman, known for his romantic and descriptive poetry. This particular poem is likely to celebrate the spirit of exploration and discovery at sea, combining both descriptive and historical elements. Without the full text available, it's challenging to provide specific details about the content of the poem. However, considering Bowles' style and themes, you can expect vivid imagery, a celebration of nature, and a reflection on historical events related to maritime exploration. Bowles' poetry often embraced the beauty of nature, contemplative reflections, and a sense of nostalgia. If you have the full text or specific questions about the poem, feel free to provide more details, and I'll do my best to assist you further.