The Commens Dictionary
Quote from ‘On Signs [R]’
…one must distinguish the Object as it is represented, which is called the Immediate Object, from the Object as it is in itself. The latter is purely active in the representation. That is, it remains in all respects exactly as it was before it was represented. It is true that the purpose of representing an Object is usually, if not always, to modify it in some respect. But by the Object Itself, or the Real Object, we mean the Object insofar as it is not modified by being represented.
MS [R] 793:14
‘Real Object’ (pub. 18.08.13-18:06). 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-signs-r-3.