When Jem became a Silent Brother, he was 17.  About 130 years later when he became a mortal again, he is described too be about the age of 19.

*clears throught*

He's only nineteen, but his mind is older.
These New York streets get colder,
Other words that I forgot. . .

Anywhoo, let's talk about Jem's violin:

Boi.  The violin that John Carstairs is playing belongs to Jem.  Does that mean that Emma has it?  On to the next pic:

This makes me so unbelievably sad.  I can't even