"I can't thank you enough," began Mr. Whilden, again turning to
the boys.

"Not at all," protested Rand, "we are very glad we were in time.
Come on, boys, it is time we were getting along."

"Now," went on Mr. Whilden, "isn't there something I can do for
you?"

"Nothing, thank you," replied Donald. "Now that Miss Nellie is all
right--I see that she is herself again--we will say good-by and go
on."

"Good-by, then, and good luck," said Mr. Whilden, "and if I can
ever do anything for you, be sure and let me know."

"I want to thank you and to know you, too," added Frank.

"All right," replied the boys as they pulled away from the yacht,
"we shall be glad to see you anytime."

Giving three blasts of her whistle as a farewell salute the Dart
resumed her course up the river,

"Who were the boys?" asked Mrs. Whilden a little later. "I want to
reward them."

"Why I don't know," replied Mr. Whilden. "I clear forgot to get
their names, after all."