The Professor’s wife gathered an armful of yarrow, saying, “This is an excellent tonic and should always be gathered before the flowers bloom.  I wonder if there is any boneset growing anywhere around here.”

Boneset, a white, flowering, bitter herb, dearly beloved and used by the Professor’s wife as one of the commonest home remedies in case of sickness, and equally detested by both Fritz and Pauline.

[Illustration:  The Narrows or Pennsylvania Palisades]

Mary gathered a bouquet of wild carrot, or “Queen Anne’s Lace,” with its exquisitely fine, lace-like flowers with pale green-tinted centres.  Mary’s Uncle could not agree with her in praise of the dainty wild blossoms.  He said:  “Mary, I consider it the most detested weed with which I am obliged to contend on the farm.”

[Illustration:  Top rock]

After quite a long, tiresome walk in the hot sun, they discovered the lonely grave, covered with a slab of granite surrounded by a small iron railing and read the almost illegible date—­“Seventeen Hundred and Forty.”  Ralph said, “If he ever sighed for a home in some vast wilderness, his wish is granted.”  It certainly was a lonely grave in the deep woods, and gave all the members of the party a sad and eerie feeling as they wended their way out into the sunlight again, to the waiting carriages, and were soon driving swiftly along the Narrows, as they have been called from time immemorial by the inhabitants, although I prefer the name of Pennsylvania Palisades, as they are sometimes called.

Said Professor Schmidt:  “Numerous tourists visit the Narrows every year.  The Narrows are said to resemble somewhat the Palisades on the Hudson.  I have seen, the latter and think these greatly resemble them and are quite as interesting and picturesque.”

“The name Narrows is derived from the fact that at this place the Delaware River has forced itself through the rocky barrier,” continued the Professor, “hedged in on one side by cliffs of perpendicular rock, three hundred feet high, extending some distance along the river, leaving scarcely room at some places for the river and the canal.  Some quite rare plants grow here, said to be found in few other localities in the United States.  You see the highest flat rock along the Narrows?  It is called ‘Top Rock’ and rises to a height of more than three hundred feet.  We shall drive around within a short distance of it; then, after passing a small house, we are obliged to walk across a field of ploughed ground; follow the well-beaten path between trees and undergrowth, and ‘Top Rock’ is before us.  Stepping upon the high ledge of rock projecting out over the road beneath, we discover it may also be reached by following a precipitous path and clinging to bushes and trees, but none of the party venture.  Recently the body of a man who had been searching for rare birds’ eggs on the side of this self-same rock was found dead on the path below the rocks.  What caused his fall is not known.  No wonder Aunt Sarah says it makes her dizzy when you boys skip stones across the river while standing on the rock.”