At first I had some idea as to the direction in which we were driving; but soon, what with our pace, the fog, and my own limited knowledge of London, I lost my bearings, and knew nothing, save that we seemed to be going a very long way.

Sherlock Holmes was never at fault, however, and he muttered the names as the cab rattled through squares and in and out by tortuous by-streets.
"Rochester Row," said he.

"Now Vincent Square.

Now we come out on the Vauxhall Bridge Road.

We are making for the Surrey side, apparently.
Yes, I thought so.