Tarrou’s description of Dr. Rieux may be suitably inserted here. So far as the narrator can judge, it is fairly accurate.
"Looks about thirty-five. Moderate height. Broad shoulders. Almost rectangular face. Dark, steady eyes, but prominent jaws. A biggish, well-modeled nose. Black hair, cropped very close. A curving mouth with thick, usually tight-set lips. With his tanned skin, the black down on his hands and arms, the dark but becoming suits he always wears, he reminds one of a Sicilian peasant.
"He walks quickly. When crossing a street, he steps off the sidewalk without changing his pace, but two out of three times he makes a little hop when he steps on to the sidewalk on the other side. He is absentminded and, when driving his car, often leaves his side-signals on after he has turned a corner. Always bareheaded. Looks knowledgeable." (1.3.43-45)
Since Rieux is the secret narrator he cannot objectively describe himself; that’s why he uses Tarrou’s journal to do so. He seems to be forgetting that, in choosing this description of himself, he removed the possibility of objectivity.