CHAPTER IV

Holiday Plans The note which puzzled the Hardy boys was as follows: “Messrs. Frank and Joseph Hardy, Bayport. “Dear Sirs: “If it is convenient for you to call upon me at my residence to-morrow I should like to talk to you about a matter that has been in my mind since my return from Europe. If you will be good enough to call early to-morrow afternoon I will explain further. Yours very truly, E…