Greer Gilman has written a lovely piece, Inscape and Outlandishness, which starts with some quotations:
A bit more on William Barnes.“-er (an ending). It means outeked in size or time:—Chatter, to chat much; clamber, to climb much; wander, to wind about.” “-sh (an ending). It means quickness and smartness; as, clang, clash; crack, crash; fly, flash; go, gush; hack, hash.” (…)Who is this madman? you ask. And what is this stuff? William Barnes’s An Outline of English Speech-Craft (1878), his grammar for the common folk, written “towards the upholding of our own strong old Anglo-Saxon speech, and the ready teaching of it to purely English minds by their own tongue.” And English, he upheld, should be of good English roots, without outlandish borrowings. “So the forlessening names, leveret for a hareling, and cygnet for a swanling, are unwontsome, as being words of another speech.” What the sturdy Saxon peasantry made of his grammar is a riddle.
Finally, I have an explanation for Poul Anderson’s Uncleftish Beholdings.