half yellow and half grey, were at work under the orders of the
gangers, we arrived at the Vor Frelsers Kirk. There was nothing
remarkable about the church; but there was a reason why its tall
spire had attracted the Professor's attention. Starting from the top
of the tower, an external staircase wound around the spire, the
spirals circling up into the sky.

"Let us get to the top," said my uncle.

"I shall be dizzy," I said.

"The more reason why we should go up; we must get used to it."

"But--"

"Come, I tell you; don't waste our time."

I had to obey. A keeper who lived at the other end of the street
handed us the key, and the ascent began.

My uncle went ahead with a light step. I followed him not without
alarm, for my head was very apt to feel dizzy; I possessed neither
the equilibrium of an eagle nor his fearless nature.

As long as we were protected on the inside of the winding staircase
up the tower, all was well enough; but after toiling up a hundred and
fifty steps the fresh air came to salute my face, and we were on the
leads of the tower. There the aerial staircase began its gyrations,
only guarded by a thin iron rail, and the narrowing steps seemed to
ascend into infinite space!