Cryptographs [noun]

In the present instance we see it doubled no less than five times, although the cryptograph is brief.

But be assured that the specimen before us appertains to the very simplest species of cryptograph.

It is a cryptograph, but a simple one, familiar to school children.

It would involve a discussion of chemical symbols and formul which would make the printed page a cryptograph.

Pray, Matthew, do you see any one sign repeated oftener than the others in this cryptograph?

The next is a very difficult and complex cryptograph to decipher.

Natural history is not a cryptograph to be deciphered, it is a series of facts and incidents to be observed and recorded.

The cryptograph used throughout the war was perfected by him, and baffled all attempts of the enemy to translate it.