"Mister Brand must ha' zeed us," pronounced Ben. "That's a warnin' to we to go back."

The words had scarce left his lips when another report smote the great silence, otherwise unbroken save by the quiet plash of the sea against the bows and the faint reverberations of the distant bell.

"That is too urgent to be intended for us," said Constance. "We were just half way when the snow commenced."

"I did not notice any vessel near the rock," cried Enid, tremulously. "Did you, Ben?"

Pollard's slow utterance was not quick enough. Before he could answer, a third rocket thundered its overpowering summons.

"That is the 'Help wanted' signal," cried Constance. "Ben, there is no question now of going back. We must keep our present course for twenty minutes at least, and then take to the oars. The bell will guide us."

"Oh, yes, Ben," agreed Enid. "Something has gone wrong on the rock itself. I am quite sure there was no ship near enough to be in trouble already."

"By gum, we'm zee what's the matter," growled Ben. "Steady it is, Miss Brand. Ef we'm in trouble I'd as soon ha' you two gells aboard as any two men in Penzance."

At another time the compliment would have earned him a torrent of sarcasm. Now it passed unheeded. The situation was bewildering, alarming. There were three keepers in the lighthouse. The signal foreboded illness, sudden and serious illness. Who could it be?

In such a crisis charity begins at home. Constance, with set face and shining eyes, Enid, flushed and on the verge of tears, feared lest their own beloved one should be the sufferer.