 Complete the following phrase:  In 1910, Robert Todd Lincoln, an esteemed scientist, the only living son of former US President Abraham Lincoln, and a close friend of incumbent President William Howard Taft, reveals to the President that he has found an old pocket watch that belonged to his father. Lincoln explains that he can find no records of his father ever acquiring or owning the watch though the watch fob was found on Abrahams person the night of 