The song has been posted before, by Jeri here (click), and by Uncle Dave Oesterreich here (click). Maybe they transcribed from the Sandy Denny recording, because I hear a few differences. This is what I hear from the Memories album by Mimi Baez Fariña and Richard Fariña, released in 1968. Richard died in a motorcycle crash on April 30, 1966 - Mimi's twenty-first birtday.

Quiet Joys Of Brotherhood
(Richard Farina)

Where gentle tides go rolling by
Along the salt sea strand,
The colors blend and roll as one
Together in the sand.
And often do the winds entwine
To send their distant call;
The quiet joys of brotherhood,
And love is lord of all.

Where oat and wheat together rise
Along the common ground,
The mare and stallion, light and dark
Have thunder in their sound.
The rainbow sign, the blended flood
Still have my heart enthralled;
The quiet joy of brotherhood,
And love is lord of all.

But men have come to plough the tide,
The oak lies on the ground.
I hear their fires in the field,
They drive the stallion down.
The roses bleed, both light and dark;
The winds do seldom call.
The running sands recall the time
When love was lord of all.

Hey - on the recording, Richard and Mimi were accompanied by an orchestra conducted by Peter Schickele (aka P.D.Q. Bach).