What is the poem at beginning of these old shades?

The poem at the beginning of "These Old Shades" is "The Prelude". It is a poem by William Wordsworth, written between 1799 and 1805. The poem is about Wordsworth's childhood and early adulthood, and it explores themes of nature, imagination, and the power of poetry. The poem is divided into fourteen books, and it is considered to be one of the most important works of Romantic literature.