All agreed that a remarkable number of important world sites were poorly documented photographically.

The precise number of languages Berg mastered, however, has never been documented.

Little Documentation The number of officers who kill themselves across the country each year is not documented, said psychologists and experts on stress.

A number of them had "been documented for decades, and many are now being discovered," he said.

If the pet has a microchip implant, that number is also documented.

The numbers of cattle losses is much more variable and less well documented.

A number of different causes (68) have been documented.

Due to the island's diverse plant life, a relatively large number of nesting bird species have been documented.

However, significant numbers of poor Colombians have also been documented.

The number of lives lost in the siege is not well documented.