I made observations for three hours last night, and am almost ill today from fatigue; still I have worked all day, trying to reduce the places, and mean to work hard again tonight.

But why look back at all? Why turn your eyes to your shadow, when, by looking upward, you see your rainbow in the same direction?

I am always the better for open-air breathing, and was certainly meant for the wandering life of the Indian.

The world of learning is so broad, and the human soul is so limited in power!

Besides learning to see, there is another art to be learned - not to see what is not.

I was a little doubtful about the propriety of going to the Mammoth Cave without a gentleman escort, but if two ladies travel alone they must have the courage of men.

We travel to learn; and I have never been in any country where they did not do something better than we do it, think some thoughts better than we think, catch some inspiration from heights above our own.