They had no doubt which it was when they arrived at the spot.  A four-oared gondola lay alongside that of the Polanis, and the gondoliers with their oars, and the two retainers with their swords, had offered a stout resistance to an armed party who were trying to board her from the other craft, but their resistance was well nigh over by the time Francis brought his gondola alongside.

One of the retainers had fallen with a sword thrust through his body, and a gondolier had been knocked overboard by a blow from an oar.  The two girls were standing up screaming, and the surviving retainer was being borne backwards by three or four armed men, who were slashing furiously at him.

“Quick, ladies, jump into my boat!” Francis exclaimed as he came alongside, and, leaning over, he dragged them one after the other into his boat, just as their last defender fell.

With a fierce oath the leader of the assailants was about to spring into the gondola, when Francis, snatching up his oar, smote him with all his strength on the head as he was in the act of springing, and he fell with a heavy splash into the water between the boats.

A shout of alarm and rage rose from his followers, but the gondolas were now separated, and in another moment that of Francis was flying along the canal at the top of its speed.

“Calm yourselves, ladies,” Francis said.  “There is no fear of pursuit.  They will stop to pick up the man I knocked into the canal, and by the time they get him on board we shall be out of their reach.”

“What will become of the signora?” the eldest girl asked, when they recovered a little from their agitation.

“No harm will befall her, you may be sure,” Francis said.  “It was evidently an attempt to carry you off, and now that you have escaped they will care nothing for your duenna.  She seemed to have lost her head altogether, for as I lifted you into the boat she clung so fast to your garments that I fancy a portion of them were left in her grasp.”

“Do you know where to take us?  I see you are going in the right direction?” the girl asked.

“To the Palazzo Polani,” Francis said.  “I have the honour of being a friend of your cousin, Matteo Giustiniani, and being with him one day when you passed in your gondola, he named you to me.”

“A friend of Matteo!” the girl repeated in surprise.  “Pardon me, signor, I thought you were two passing gondoliers.  It was so dark that I could not recognize you; and, you see, it is so unusual to see a gentleman rowing.”

“I am English, signora, and we are fond of strong exercise, and so after nightfall, when it cannot shock my friends, I often take an oar myself.”