The Commens Dictionary
Quote from ‘Letters to Lady Welby’
A Sign may bring before the Mind, a new hypothesis, or a sentiment, a quality, a respect, a degree, a thing, an event, a law, etc. But it never can convey anything to a person who has not had a direct experience or at least original self-experience of the same object, collateral experience.
MS [R] L463:14
‘Collateral Experience’ (pub. 09.08.17-00:48). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-letters-lady-welby-55.