Good morning my friend Aquanut: Many of my good friends are Archaeologists of varying levels. It is simply human nature to retain an object or two. The question of legality, morality, or personal level of honesty is a very grey area. In their case, I would probably tend to do the same.
The term looting, as they use it in reference to treasure hunters or salvors, is exactly the same if applied to them. Artifacts kept for personal use or gain. Artifacts kept in an archaeologist's home or a Treasure hunter's are exactly the same.
I have a very close friend that uncovered a hammer that was used in the copper mines of Crete that had perhaps 1/2 of the wooden handle being replaced with copper, an extremely rare occurrence. Is it in a museum for study ? Nope, it is in his living room on a pedestal. I am not even sure that he submitted a Paper on it.
As for having had time to find data and stories of ships, mines, lost treasures from mule trains or simply the family olla of coins, yes, I literally have hundreds of them. The problem is that most are in my memory banks and are brought out by a remark or side reference. Some day (?) I have to list them and put them on a disc, such as the final location of Cromwell's ship. Yes, he did exist. It is broken up and much of the remains are now land locked - sand. they occasionally find gold coins in the surrounding area.
Speaking of Cromwell, he used to anchor in a small bay just below Los Mochis where his anchorage was hidden from view. There were fresh water springs on the hill. The Indian that told me this story said that his father used to hide up on the mountain side overlooking the anchorage, and watch them sort things on the deck, throwing many objects overboard. Archaeologists take note. Once they took two large heavy chests up the mt to the spring where they buried them. They have never been recovered according to him.
Another simple example was Elle's search on the Tubares mission. I had forgotten about my exploration trip to there which required a 3 days mule ride from the nearest village. It had been abandoned. However talking to her brought out the memory that I had found where a new, still unknown mission was being constructed. It was to be used to communicate by mirror by day, or fire at night between the missions of Tubares and Guazapares. It was named for one of the fathers that was killed in the Indian uprising.
I was looking for the lost Spanish mine La Gloria Pan / La Mina del peligro, which was not too far away, only one day by mule. Incidentally, Yes, I found the mine.
Don't get me to talking about these things, I can ramble on for hours, obviously.
Don Jose de La Mancha