Describe Arthur Dimsdale

From the text:

"...young clergyman..."

"He was a person of very striking aspect, with a white, lofty, and impending brow; large, brown, melancholy eyes, and a mouth which, unless when he forcibly compressed it, was apt to be tremulous, expressing both nervous sensibility and a vast power of self restraint."

"...there was an air about this young minister—an apprehensive, a startled, a half-frightened look—as of a being who felt himself quite astray."