Help! I don’t really get the meaning of this poem! Can someone PLEASE analyse each stanza?

The hunchback in the park
A solitary mister
Propped between trees and water
From the opening of the garden lock
That let the trees and water enter
Until the Sunday sombre bell at dark

Eating bread from a newspaper
Drinking water from the chained cup
That the children filled with gravel
In the fountain basin where I sailed my ship
Slept at night in a dog kennel
But nobody chained him up.

Like the park birds he came early
Like the water he sat down
And Mister they called Hey mister
The truant boys from the town
Running when he had heard them clearly
On out of sound

Past lake and rockery
Laughing when he shook his paper
Through the loud zoo of the willow groves
Hunchbacked in mockery
Dodging the park-keeper
With his stick that picked up leaves.

And the old dog sleeper
Alone between nurses and swans
While the boys among willows
Made the tigers jump out of their eyes
To roar on the rockery stones
And the groves were blue with sailors. . .