He searched through his own subjective thought processes, analyzing, checking and Correlating them.
"Suite Mentale"
Gordon Randall Garrett
Since no direct means exist of Correlating the time in one biography with the time in another, this temporal grouping of the appearances belonging to a given thing at a given moment is in part conventional.
"Mysticism and Logic and Other Essays"
Bertrand Russell
Now the important thing here is that you should set all your faculties to take in the things about you with the particular object of Correlating them and storing them for use in public speech.
"The Art of Public Speaking"
Dale Carnagey (AKA Dale Carnegie) and J. Berg Esenwein