No, Sanctuary is not a mere potboiler but you do see something in it of Faulkner the yarn-teller, who is usually more submerged beneath other things.
… I must have read this years ago, for while I encounter the plot as something new (probably having not previously understood it) certain sentences throughout it will ring out as familiar — e.g. “a careful coal.”
.i`` * ^ / . . . . . ` `~ 