I wouldn't change the footnote either, if I were you. It doesn't affect the more important point you are making.
M.J. is right that many of the references in the 1930's concentrate on the enthronement of Jesus as king and the birth of the kingdom rather than on his coming or presence. A number of events that had all been previously dated to different years all had to be consolidated and this makes it difficult to find the "perfect quote" showing that the date for Christ's coming / advent / parousia / return had indeed changed from 1874 to 1914.
At the same time though, there can be little doubt as to what the offical teaching was. The evidence is overwhelming:
"Concerning his second coming as Judge and King, Christ Jesus said: 'When the Lord shall come in his glory, and all his holy angels with him, then will he sit upon his throne of glory,' and that would be the time that he would as a shepherd divide the sheep from the goats. (Matt. 25:31-46) He began his reign in 1914, but it was in 1918 when he came to the temple for judgement and for the separation of the sheep and goats." The Watchtower April 1, 1933 p. 100
"This, in the light of the fulfilment of other prophecies, fixes the time of the coming of the Great Prophet foreshadowed by Moses and of the fulfilment of the prophecy on the grander scale, and which time began with the year 1914." The Watchtower May 15, 1933 p. 119
"The seventh world power continues to "stand up against the Prince of princes" by steadfastly resisting the great fact that the Gentile times ended in 1914 and that Christ Jesus is now present, and that he is earth's rightful King, and that all should bow to him. The Watchtower July 1, 1933 p. 198
"In 1914 that time limit ended and Christ Jesus, the King of righteousness, was installed upon his holy throne. The end of the Gentile times and the coming of earth's King, was the great event to which the faithful followers of Christ had looked forward." The Watchtower February 15, 1934 p. 56
"Christ Jesus, the Greater Moses was likewise refused or rejected by the nation of Israel in A.D. 33 and was crucified in antitypical Egypt and was later raised from the dead and taken to heaven. After waiting a long period of time, Christ Jesus is sent back, in the 1914 (A.D.), clothed with full power and authority to rule." The Watchtower May 1, 1934 p. 133
"With the coming of the Lord Jesus as King in the year 1914 the whole world was under the dominating control of Satan, he operating chiefly through his religious agents, and the people were in the dark as to the means of escape or fleeing to a place of safety and being protected at Armageddon. The Watchtower January 15, 1938 p. 24
"When on earth Jesus gave his great prophecy concerning his second coming and the end of the world. (Matthew, chapter twenty-four) Chapter six of The Revelation parallels that prophecy, and is a tableau in which Christ Jesus is the chief actor. It is Christ Jesus who opens the "seven seals" of the book "in the right hand of him that sat on the throne", thus proving that no man can open the prophecies; but God permits his men to understand the prophecies after the seals are openend. It does not even follow that a man would understand the prophecies as soon as the seals are open. It can now be seen that the events pictured in the first five seals were fulfilled from AD. 1914 to 1918, but the meaning thereof man could not understand until after the coming of the Lord to his temple, in 1918. Prior thereto the faithful church had been appliying the prophecy of Matthew twenty-four to the events that came to pass from A.D. 1874 to 1914. Not until after 1918 was it understood by the church that these sealed events apply after 1914; and hence the seals were not open to or discerned by the John class, that is to say, by the remnant until after 1918, and, in fact, very little until 1922." The Watchtower June 15, 1938 p. 189
"Jesus Christ told his apostles what conditions would exist on earth at the time of his coming, by whcih conditions all of his true followers would know that the time had arrived for setting up of the thocratic government. Those foretold conditions definitely began to appear in A.D. 1914, at which time Jehovah enthroned his King, Christ Jesus, and sent him forth to rule while the enemy Satan still operates in the earth." The Watchtower January 15, 1938 p. 23
"The great antitypical David, Christ Jesus, did return in A.D. 1914, and in 1918 he came to the temple and there began the building up of Zion, concerning which all of God's prophets had foretold." The Watchtower June 15, 1938 p. 181
