Farewell

[Philatone]

hey!
havent read the other comments thoroughly, so that being said:

Walk with me to a bank beside
A river rippling running slow, ..the "ing"'s, so close together, distracted me a bit. Do like the word choice, but not certain about the participles
Where wild and wary wood-things hide, .."wild and wary" I felt was very accurate.
In trees and roots and holes below. .. like the "and"'s

Walk with me there, yet do not stay; ..do you need the "there"?
Begone before the setting sun ..melodic word choice, nice effect
Farewells for me the split of day
And the dusk and night and the peace, ..here, I think the "ands"' may be too much. not sure why. maybe it is because there is another line after. but I wonder if that line is even necessary? how was it wearily process? I'm not sure what is added by it.
the peace so wearily won.

Walk once again to my abode,
Wander wide and wander whither
Piers poppy-pastures ploughed;
Find my lych, and bring it thither;
lay it there,
and leave: ..i'm not sure if you need the colon to enhance effect. having "my child" on a line by itself works just fine for me, stylistically.
my child. a good ending regardless

..the final sounds of these lines didn't mesh as well as the others for me. I think it is the -er endings, which receive a rather strong emphasis. Swapping the words (.e.g, Wander whither and wander wide) could work. just my opinion.
{Note: I had in mind Piers Plowman}

hope this is helpful. nicely written