“First,” said he, “I will make a calculation to ascertain our exact position. I hope, after our return, to draw a map of our journey, which will be in reality a vertical section of the globe, containing the track of our expedition.”

“That will be curious, uncle; but are your observations sufficiently accurate to enable you to do this correctly?”

“Yes; I have everywhere observed the angles and the inclines. I am sure there is no error. Let us see where we are now. Take your compass, and note the direction.”

I looked, and replied carefully:

“Southeast by east.”

“Well,” answered the Professor, after a rapid calculation, “I infer that we have gone eighty-five leagues since we started.”

“Therefore we are under mid-Atlantic?”