Neither "Ghost Lover" nor "After the Goldrush" are in the DT. The way you search for a song at Mudcat is to enter the title in the box at te upper left corner titled, "Lyrics & Knowledge Search." This will search the DT and the Forum for and/or lyrics or discussions about the song.

In this case, since the song is not in the DT database, you may find Mudcatters with knowledge of the songs posting responses to your request.