Listen to I'm Gonna Sit Right Down & Write Myself a Letter online. I'm Gonna Sit Right Down & Write Myself a Letter is an English language song and is sung by Billy Williams. I'm Gonna Sit Right Down & Write Myself a Letter, from the album JukeBox PlayList, Vol. 1, was released in the year 2016. The duration of the song is 2:11. Download English songs online from JioSaavn.