Here is Dan Saxon's self published Absence, Number Two in the Poets of Le Metro chapbook series. This is absent from Clay and Phillips. To be honest, it is an easy publication to overlook. Nothing elaborate, the very definition of simplicity of design and production. Maybe 100 were printed and those, I suspect, largely went to friends.
149 Second Avenue was the address of Café Le Metro. For an interesting write up of the history of that address with some great photos, click here. For that matter, check out the entire Off the Grid blog for the Greenwich Village Society for Historic Preservation, click here. It is a wonderful blog.