They then smashed the looking-glasses, so that the Boers should make no heliographs of them.
Signallers with heliographs were pushing forward upon them from all sides.
The day was cool and cloudy; fair shelling weather, but bad for heliographs.
Give to the corps a liberal supply of heliographs and instruct the men how to use them.
Taking the sunbeam for its pencil, it heliographs ...