Theory:

Meanings of difficult words from the poem "From A Railway Carriage":
  
No.
Words
Meanings
1
fairysmall imaginary female being that has magical powers
2
witcha woman thought to have magic powers, especially evil ones
3
hedgea boundary formed by closely growing bushes
4
ditcha narrow channel dug at the side of a road or track, to hold or carry away water
5
chargea headlong rush forward, typically in attack
6
troopssoldiers
7
meadowsa piece of grassland, especially one used for hay
8
wink of an eyeinstantly; used here to express time frame - it takes a second to close and open one's eyes
9
clambersclimb or move in a difficult manner, typically using both hands and feet
10
scramblesclimb up quickly, awkwardly, to clamber
11
bramblesa prickly shrub, especially a blackberry
12
trampa person who travels from place to place on foot in search of work or a beggar
13
gazeslook steadily and intently
14
green(here), a piece of public grassy land, especially in the centre of a village
15
stringinghang so that it stretches in a long line, make a crown/garland (of flowers, here)
16
lumpingcarry (a heavy load) somewhere with difficulty
17
glimpsea momentary view, a glance