…Firstness, or the mode of being of that which is such as regardless of anything else, as exemplified by simple Qualities of feeling…
This quote has been taken from Kenneth Laine Ketner's 1983 reconstruction of Peirce's 'Autobiography'. Ketner identifies the source as "variant pages" of the manuscript. Ketner refers to the portion from MS [R] 914 with the page number 2; in the manuscript, it is 5.
http://www.commens.org/dictionary/entry/quote-brief-intellectual-autobiography-charles-sanders-peirce-27