Perhaps you should try some spelling variations:
damped telegraph » based telegraph, der telegraph, jump telegraph
early telegraph » early typography, early tomography, marine telegraph
mails telegraph » marine telegraph, mayo telegraph, cable telegraphy

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((damped telegraph) OR (early telegraph))) OR (mails telegraph)).
• Adding a wildcard symbol may retrieve word variants: ((((damped telegraph) or (early telegraph))) or (mails telegraph))*.