"And if we find out that they are really his sons, what then?" queried
Grace, and this time Betty looked puzzled and Mollie and Amy completely
beyond their depth.

"Why then," said Betty hesitatingly, "I'm sure I don't just know what we
ought to do. But don't you think," she added, brightening, "that it might
be a good idea to wait until we have found out definite facts before we
try to solve any more problems?"

Rather reluctantly the girls agreed and, after making Betty promise that
she would let them know the very first minute she found out the names of
Arnold Dempsey's sons, they said good-bye and started for home.

Of course Betty had already told her father and mother about Professor
Dempsey and the part he had played in actually saving their lives; so when
she told them that night of what she had read in the paper and begged her
father to help her find out whether the dead soldiers were really Arnold
Dempsey's sons or not, he readily consented to do what he could.

"I'll drop in and see Haig to-morrow," he promised. "I have often heard
him speak of Professor Dempsey as being one of the best professors of
zooelogy up at the university and I am sure I will be able to find out what
you want to know. I hope you have been mistaken in your conclusions, for
it would be a horrible blow to a man to lose both his grown sons at once
and like that. Now run off to bed and tomorrow I may have some news for
you."

With this Betty was forced to be content. She went to bed of course, there
was nothing else to do, but she tossed restlessly all night and what sleep