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.

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

I am just learning to notice the different colors of the stars, and already begin to have a new enjoyment.

I would as soon put a girl alone into a closet to meditate as give her only the society of her needle.

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

I had only ordinary capacity but extraordinary persistency.

There is something of the same pleasure in noticing the hues of the stars that there is in looking at a flower garden in autumn.