When was the song “Footprints” released by Bill Callahan?

The song Footprints was released in 2007, on the album “Woke on a Whaleheart”.

Bill Callahan

Footprints

Bill Callahan

[Intro]
Oh oh oh oh
Oh oh oh oh

[Verse 1]
Last summer's footprints are walkin'
Walkin' dove, walkin' dove, walkin' dove, walkin' dove
Through last summer's sand
A dove, walkin' dove, walkin' dove, walkin' dove
And where the footprints end
Where the footprints end
What happened then?
Where the footprints end

[Verse 2]
Was not a wave that swallowed them
No, a gust of wind that did them so
No, where the footprints end
We must have flown!
Yea, we must have flown
Over tempting sea
And we must have flown
Heavy earth and air
Our heart and brain
The odd couple lookin' at rings

[Verse 3]
The sea above
The sky below
We must have flown
Where the footprints end
And when we realize we can't fly
Will we say, "Do you think
We must have danced up into the sky?"

[Outro]
Last summer's footprints are walkin'
Walkin' dove, walkin' dove, walkin' dove, walkin' dove
Through last summer's sand