Possible Clues:

• He wrote line about good companion
• Author of an 1841 poem that contains the line spelled out by the circled squares
• US poet, author of 'The Song of Hiawatha'
• Poet who would look down on many?
• Poe try for him as tall as he?
• Poet Henry Wadsworth ___
• 'Hiawatha' writer
• Pine by hill starts to overshadow wood for poet
• Poet, unlike his subject, Thangbrand the Priest ('Short of stature, large of limb')?
• Yearn for the chap who wrote Ultima Thule