"But you will, perhaps, think that there is an offset in the honors and emoluments that await the successful inventor, one who has really demonstrated that he has made an important discovery. This is not so. Trials of another kind are ready for him after the appropriate difficulties of his task are over. Many stand ready to snatch the prize, or at least to claim a share, so soon as the success of an invention seems certain, and honor and profit alone remain to be obtained. "This long prelude, C----, brings me at the same time to the point of my argument and to my excuse for my long silence. My argument goes to prove that, unless there is a benevolent consideration in our discoveries, one which enables us to rejoice that others are benefited even though we should suffer loss, our happiness from any honor awarded to a successful invention is exposed to constant danger from the designs of the unprincipled. My excuse is that, ever since the receipt of your most welcome letter, I have been engaged in preparing to repel a threatened invasion of my rights to the invention of the Telegraph by a fellow-passenger from France, one from whom I least expected any such insidious design. The attempt startled me and put me on my guard, and set me to the preparation for any attack. I have been compelled for some weeks to use my pen only for this purpose, and have written much in the hope of preventing the public exposure of my antagonist; but I fear my labor will be vain on this point, from what I hear and the tone in which he writes. I have no fear for myself, being now amply prepared with evidence to repel any attempt which may be made to sustain any claim he may prefer to a share with me in the invention of the Telegraph." I have already shown that this claim of Dr. Jackson's was proved to be but the hallucination of a disordered brain, and it will not be necessary to go into the details of the controversy. These were anxious and nerve-racking days for both Morse and Vail, and it is small wonder that there should have been some slight friction. Vail in his private correspondence makes some mention of this. For instance, in a letter to his brother George, of January 22, 1838, he says:-- "We received the machine on Thursday morning, and in an hour we made the first trial, which did not succeed, nor did it with perfect success until Saturday--all which time Professor M. was rather _unwell_. To-morrow we shall make our first exhibition, and continue it until Wednesday, when we must again box up. Professor M. has received a letter from Mr. Patterson inviting us to exhibit at Philadelphia, and has answered it, but has said nothing to me about his intentions. He is altogether inclined to operate in his own name, so much so that he has had printed five hundred blank invitations in his own name at your expense."