Stops were made at Ridgway on the Middle division and at Irvineton on the Western division to examine the Robinson closed circuit rail system of signals, which were in full operation at those points. A thorough examination and various tests were made, to all of which the signals responded promptly and perfectly. The following is from a letter by Mr. Robinson to his brother on October 25, 1873: "Mr. Baldwin could not say enough in favor of the signals." * * * "Of course I remained in the background, except, as to giving explanations. After a while Cassatt, Pitcairn and Thomson got into a discussion of the battery and other points, and called me into the ring to enter into the discussion, and it was quite animated for some time. Pitcairn proceeded to give his idea of what a signal should be, and Mr. Baldwin and the rest proceeded to show him that this, was exactly his ideal." "Mr. Gardner, after learning _modus operandi_ from diagrams &c. proceeded to lay down the law to the rest, demonstrating how they would have 'prevented those accidents.'" "They were all very much pleased with the signals but their operation seemed such a surprise that I judge it will take them several days to think over and realize the actual operation and importance of the thing." Robinson's Work in New England In December, 1875, Mr. Robinson went to Boston and took up his residence there. In January, 1876, he made an installation of his closed rail circuit system between Elm street and North avenue, West Somerville, on a branch of the Boston and Lowell railroad. This installation worked perfectly from the beginning. The Emperor of Brazil Examines the Robinson Signal System In June, 1876, His Imperial Majesty, Dom Pedro II, Emperor of Brazil, being then in Boston, graciously accepted an invitation from Mr. Robinson to examine his Wireless Signal System in operation on the Boston & Lowell railroad. Accordingly, on June 14, they proceeded together by special train to West Somerville for the purpose. The following is an account of the visit, from the _Boston Post_ of June 15, 1876: "DOM PEDRO II. "HIS MAJESTY WITNESSES THE OPERATIONS OF RAILROAD SIGNALS. "Though the visit of His Majesty, the Emperor of Brazil, to this city has been a brief one, yet it is not hazardous to say that no other crowned head or representative of royalty who has ever appeared in Boston has more closely inspected the places where centre arts, sciences and manufacturers than he.