Analysis of Legend

THERE is an hour, they say,
On which your dream has power:
Then all you wish for comes,
As comes the lost field-bird
Down to the island-lights;
There is an hour, they say,
That's woven with your wish:
In dawn, or dayli’ gone,
In mirk-dark, or at noon,
In hush or hum of day,
May be that secret hour.

A herd-boy in the rain
Who looked o'er stony fields;
A young man in a street,
When fife and drum went by,
Making the sunlight shrill;
A girl in a lane,
When the long June twilight
Made friendly far-off things,
Had watch upon the hour:
The dooms they met are in
The song my grand-dam sings.