Take the following as truth: To my surprise, he did not examine them, merely remarking approvingly as he relocked the desk: "Decidedly, he is a man of method, this Mr. Inglethorp!" A "man of method" was, in Poirot's estimation, the highest praise that could be bestowed on any individual. 
Then the following statement: "He spent a long time looking through the desk." is true, false, or inconclusive?
Answer: False