Can we draw the following hypothesis from the context?

Context:

Robert Lewis Dabney (March 5, 1820 January 3, 1898) was an American Christian theologian, Southern Presbyterian pastor, Confederate States Army chaplain, and architect. He was also chief of staff and biographer to Stonewall Jackson. His biography of Jackson remains in print today.

Hypothesis: Dabney was the biographer to Stonewall Jackson in the 1900's.
No