Believing that provenance is worthy of investigation I propose examining each of the skulls in that light. I will give my own evaluation based on a score of 1 through 10 with one being extremely probable, and 10 being extremely improbable.
I will start with probably the easiest skull to begin with is that described in the Forbidden Knowledge website. It reads as follows:
[SIZE=+4]John The Baptist's Cave -
And Head? - Believed Found[/SIZE] [SIZE=+1]12-28-00[/SIZE]
http://www.rense.com/general6/johnbaptist.htm
[SIZE=+1]
AMMAN [/SIZE][SIZE=+1](AFP) - A cave unearthed last year under the remains of a fourth century Byzantine church on the east bank of the Jordan River was the winter home of the Christian New Testament prophet John the Baptist, project director Mohammad Waheeb said Wednesday.[/SIZE] [SIZE=+1]But experts are still investigating the identity of a human skull found near the cave to determine if it could also belong to John, who the Bible says was the cousin of Jesus Christ, Waheeb told AFP.[/SIZE] [SIZE=+1]He was commenting on a report published Wednesday by Al-Dustour newspaper, which said the skull found near the cave in Jordan's Wadi Kharrar "could be that of St. John the Baptist".[/SIZE] [SIZE=+1]
"The cave and the skull were unearthed last year," Waheeb said. "Reseach has determined that the cave belonged to St. John the Baptist, but experts led by Dr. Abdullah al-Nabulsi are still examining the skull," Waheeb told AFP.[/SIZE] [SIZE=+1]"Until now, testing on the skull has not been completed, so we can only say it belonged to a hermit, because the region of Wadi Kharrar was inhabited by many hermit," he said.[/SIZE] [SIZE=+1]The cave carved into the rock was dated to the 1st century A.D., Waheeb said.[/SIZE] [SIZE=+1]The skull was found "directly next to the cave, buried on its own," he said.[/SIZE] [SIZE=+1]
Remains of three other ancient churches were found around the cave, demonstrating the "sacredness" of the site, where Waheeb and the Jordanian ministry of tourism say Jesus Christ was baptised.[/SIZE] [SIZE=+1]Over the past few years, Jordanian archeologists led by Waheeb have uneartherd ancient churches and huge baptismal pools in Wadi Kharrar, known in antiquity as Bethany Beyond the Jordan.[/SIZE] [SIZE=+1]It is located just east of the Jordan River and opposite Jericho. The gospel of Saint John the Evangelist says Jesus crossed to the east bank of the river to be baptised by John the Baptist.[/SIZE] [SIZE=+1]Further east is located the biblical site known as Machaerus, where John the Baptist is said to have been beheaded on the orders of Herod Antipas, the ruler of Galilee.[/SIZE] [SIZE=+1]
Fearful of John's great influence over the people, Herod had him arrested and imprisoned at Machaerus on the Dead Sea when John denounced his adultrous and incestuous marriage with Herodias, wife of Herod's half brother, Philip.[/SIZE] [SIZE=+1]John was beheaded at the request of Salome, daughter of Herodias, who asked for his head on a plate at the instigation of her mother after dancing for the king and being promised a reward.[/SIZE][SIZE=+1]Israel and the Palestinians claim that Jesus was baptised in a spot on the western bank of the river known as Qasr el-Yahud.
[/SIZE]
The Boston Globe also printed the following article:
Article: A CLASH OF CLAIMS IN HOLY LAND
Article from:The Boston Globe (Boston, MA) Article date

ecember 8, 1999Author:Charles M. Sennott, GLOBE
STAFF
CopyrightCopyright 1999 The Boston Globe. (
Hide copyright information) WADI KHARRAR, Jordan - Five years ago, this was a front line in the Arab-Israeli conflict - a barren desert landscape interrupted only by barbed wire, an infantry battalion's watchtower, and a field of small flags marking land mines buried beneath the chalky terrain.
As troops redeployed after the peace agreement between Jordan and Israel in 1994, a tank rolled over what appeared to be an ancient foundation, and its treads revealed a mosaic tile floor.
Following the chance find, Jordanian archeologist Mohammad Waheeb waited for specialists to finish the tedious task of clearing the land mines, then began his work. After two years of studying biblical texts and dating archeological artifacts, ...
Here is another brief article from a 2000 edition of Christianty Today.
John the Baptist's grave reported found
"Last year, archaeologists discovered a cave beneath the remains of a fourth-century Byzantine church on the east bank of the Jordan River. Now they're trying to figure out if a skull found there belonged to John the Baptist. "Research has determined that the cave belonged to St John the Baptist, but experts ... are still examining the skull," said project director Mohammad Waheeb. "Until now, testing on the skull has not been completed, so we can only say it belonged to a hermit, because the region of Wadi Kharrar was inhabited by many hermits," he said. Expect the results to be
controversial—Israel claims that John the Baptist wasn't at Wadi Kharrar, but instead baptized on the western bank of the river in a spot called Qasr Al Yahud (The Jewish Palace). Still, it won't be as controversial as a
Japanese town that
claims to have the body of Jesus Christ"
Analysis
There are three sources cited above. The Forbidden Knowledge website is, at best, improbable, as a site. Much of its other information is either provable false or absurd, as noted by Thekla in previous posts. The other two sources cited here, although reliable, mere report the facts of the matter without comment regarding veracity.
Source credibility - 1
Other authenticating sources. The only other known authenticating source is the project director, Mohammed Waheeb. It can be safely assumed that this gentleman is a Muslim and not a Christian and may have other motives which are suspect. He is an archaeologist by profession. A brief internet search did not reveal any further details regarding his professional credentials nor did it reveal any peer-reviewed articles by him concerning this find or any other work by him.
Other authenticating sources - 2
Provenance. The provenance is, as stated in the articles, that the skull was unknown until Dr. Waheeb discovered it in 1999. No further provenance is available via internet sources. It is unknown as to whether any scientific examination was performed or its current location.
The best thing that can be said is that it is probably the skull of a hermit living in a cave in that location. There is a great deal of doubt as to whether the skull, following the beheading of John the Baptist in Jerusalem was transferred to this location.
Provenance - 1
Overall score - 1 1/3
This score is my personal evaluation based upon my limited knowledge and is open to discussion/