John H. Glines' September 16, 1846 letter to Heber C. Kimball and "the new and everlasting Covenant" not being Eternal Marriage or Plural Marriage

John H. Glines, in his letter to Heber C. Kimball dated September 16, 1846, began the communication thusly (emphasis added)

 

Dear Friend and Br in the new and everlasting Covenant of the Gospel of Jesus Christ to you I feel due to write and communicate to you the news of this Batallion and also the condition in which I am placed at present . . . 

 

This shows that the “new and everlasting Covenant” is not one-to-one equivalent to eternal marriage, let alone plural marriage.