Reading that, it's a scroll with unknown provenance (many wildly inconsistent stories were told about where it was found) from a guy who promulgated other fraud

Reading that, it's a scroll with unknown provenance (many wildly inconsistent stories were told about where it was found) from a guy who promulgated other frauds and all we have left is apparently a drawing of it. I don't think you can meaningfully authenticate a scroll from just that, especially not one with a dubious history like this.