[Grammar] are in the very first flight of trance mediumship

[jacob123]

Does "are" refer to "John Ticknor" and "Mr. Nugent" or does it refer to all of them?

Mrs. Susanna Harris has also afforded good evidence upon physical lines, as has Mrs. Wagner, of Los Angeles, while among amateurs John Ticknor, of New York, and Mr. Nugent, of Belfast, are in the very first flight of trance mediumship.

"The History of Spiritualism," by Arthur Conan Doyle

 

[Charlie Bernstein]

Does "are" refer to "John Ticknor" and "Mr. Nugent" or does it refer to all of them?

Mrs. Susanna Harris has also afforded good evidence upon physical lines, as has Mrs. Wagner, of Los Angeles, while among amateurs John Ticknor, of New York, and Mr. Nugent, of Belfast, are in the very first flight of trance mediumship.

"The History of Spiritualism," by Arthur Conan Doyle

Try diagramming it.

The highlights will help.