This is why it is important for archaeologists to record exactly where artifacts are found.

so they will know which items they may claim and keep after the dig is
completed.
for proper documentation so they are not accused of stealing ancient items
from a dig site.
to establish relationships between the items found in order to determine how
the items were used by ancient people.
so they are able to return them to the exact same spot when they are finished
with their study of the dig site.