Full Idea
Behind the bare phenomenal facts, as my tough-minded old friend Chauncey Wright, the great Harvard empiricist of my youth, used to say, there is nothing.
Clarification
Wright was a forgotten founder of Pragmatism
Gist of Idea
Behind the bare phenomenal facts there is nothing
Source
Chauncey Wright (talk [1870]), quoted by William James - Pragmatism - eight lectures Lec 7
Book Reference
James,William: 'Pragmatism - eight lectures' [Dover 1995], p.101
A Reaction
This is the best slogan for strong phenomenalism ever coined! It also seems to fit David Lewis's approach to philosophy, as the pure study of the mosaic of experiences.