I love how Keats writes so deftly that lines stay in my memory even if I haven't thought of learning them. But just now reading this I noticed for the first time that Keats sees gleaners carrying away big, hard-to-balance bundles of gleanings on their heads - I wonder how true to life that was? He was a townie, but the Romantics generally tried to observe truly, I think.
(And if it is true, then did gleaners claim territory for themselves, and warn off other, less fortunate gleaners? Ooooh... social history wherever you look!)