I will meet you if you really wish it. I will bring out the papers with me and trust in you to employ persons who know how to keep their mouths shut. My address in reply will be Mr John Marshall, Grand Hotel, Birmingham.

B.B.”

The mystery increased. Why did Blair wish for the employment of persons who would remain silent? What was the nature of the work that was so very confidential?

Evidently Blair took every precaution in receiving communications from the Italian, causing him to address his letters in various names to various hotels whither he went to stay a night, and thus claim them.

Mabel had often told me of her father’s frequent absences from home, he sometimes being away a week or fortnight, or even three weeks, without leaving his address behind. His erratic movements were now accounted for.

Consumed by anxiety I waited day after day, spending hours on that maddening cipher on the playing-card, until, on the morning of the 6th of March, Carlini having been unsuccessful in Florence, I took him with me up to the old city of Lucca, which, travelling by way of Pistoja, we reached about two o’clock in the afternoon.

At the Universo I was given that enormous bedroom with the wonderful frescoes which was for so long occupied by Ruskin, and just before the Ave Maria clanged away over the hills and plains, I parted from Babbo and strolled tourist-wise into the magnificent old mediaeval church, the darkness of which was illuminated only by the candles burning at the side altars and the cluster before the statue of Our Lady.

Vespers were in progress, and the deathlike stillness of the great interior was only broken by the low murmuring of the bowed priest.

Only about a dozen persons were present, all of them being women—all save one, a man who, standing back in the shadow behind one of the huge circular columns, was waiting there in patience, while of the others all were kneeling.

Turning suddenly on hearing my light footstep upon the marble flags, I met him next second face to face.