The assertion is part and parcel of the narrative itself.
"The Expositor's Bible: The Book of Exodus"
G. A. Chadwick
Soon Tommy came back; he carried a parcel; his face was rather gloomy.
"The Furnace"
Rose Macaulay
Jack's opinions, right or wrong as they may be, are part and parcel of a character already awaiting their verdict.
"The Martins Of Cro' Martin, Vol. II (of II)"
Charles James Lever