Yet this is no reason for abandoning the study of history.
There is another class of difficulties.

As anthropology becomes popular, every inquirer knows what customs he _ought_ to find among savages, so, of course, he finds them.

In the same way, people may now know what customs it is orthodox to find among ghosts, and may pretend to find them, or may simulate them by imposture.

The white sheet and clanking chains are forsaken for a more realistic rendering of the ghostly part.

The desire of social notoriety may beget wanton fabrications.