roduction to the principal policeman in the British Museum Library.
This great man examined the envelope very carefully, but with no result,
and the only advice he could give him was to call at every house
numbered 56 at 6.30 in the morning and see what would happen.

'The tailor followed this advice diligently for some time and met with
many rebuffs, as he had nothing to say on the door being opened to him.
At length one morning he came to an empty house numbered 56, the steps
of which were littered with straw. Gazing hopelessly at this for some
time, he noticed that three pieces pointed distinctly in one direction
to the corner of the street, and you may well imagine his surprise when,
on following the direction indicated by the straw, he came across this
postcard.'

Ptolemy Jenkinson here handed this torn postcard to the company.

[Illustration: POSTCARD]

Ptolemy again proceeded with his story:--

'Now the tailor, more puzzled than ever, took the card home, and, after
weeks of deep thinking, decided that the card must have been completed
thus.'

Ptolemy here handed the remaining portion of card, with the tailor's
suggested completion, to the company.

'You may guess the surprise of every one present when the tailor
produced the completed card. The Lord Mayor gazed at it in astonishment.
He turned it over and over, and suddenly noticing that there was a
foreign stamp on the other side, he became more excited than ever, and
asked if he might tear it off, as his son had rather a good collection.
This the tailor readily allowed him to do, and this put the Lord Mayor
in a good temper for the rest of the afternoon, and gave a more cheerful
aspect to the case altogether.

[Illustration: POSTCARD]

'After the tailor's evidence, which, of course, proved that the doctor
had not intended to bring about the harm of which he had been the
unfortunate cause, there was nothing for the Lord Mayor to do but to
acquit the prisoner, which he did, much to everybody's relief.

'The Lord Mayor then retired, after ordering a new suit of clothes from
the journeyman tailor, and inviting the Sicilian charwoman and the other
witnesses to progressive whist and to be introduced to his family.

'So, Gentlemen,' said Ptolemy in conclusion, 'my uncle and myself are
quite free at last, and entirely at your service.'

Such a valuable offer could not very well be refused, so, after
explaining the object of the expedition to their new fri