Nope, he is not connected with John Surratt.

Did he have to do with Mary Suratt?

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Or Atzerodt?

Nope, he was not connected with Mary Surratt or George Atzerodt.

Connected with Dr. Sam Mudd?

Does the source you used for the image have a date for it? By the man's clothes, I was thinking it dates from at least a decade earlier.

Anyway for my next guess...

John W. Wharton, the employer of Arnold?

Henry Burnett?

Thanks for trying everyone, but no one is correct. Steve, the photo is undated in the book where I found this photo. I believe the author probably got the photo from a descendant, and it's possible the family does not have a date for it.

Hint #4: The book which has the photo when the man was older has been previously mentioned on the forum. This book was written by a member of this forum.

Hint #4.25: In one previous guess, the right conspirator was mentioned in the post, but the person guessing did not ask if this were the right conspirator.

Hint #4.5: The book where I found the photo for this question has been previously mentioned on the forum.

Hint #4.75: The man in the photo has been previously mentioned on the forum.

Would the person pictured have supported the Confederacy?

Is Herold the respective conspirator?

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Do you refer to Kathy's book? Or Tom Bogar's?

Gene, Wikipedia says the person was a Union supporter.

Eva, no, no, and no.

Wild guess, but Parson Lemuel Wilmer?

Nope, not him.

Hint #5: The book (written by a member of this forum) that has the photo of this man when he was older has been mentioned in one of the previous wrong guesses for this question.

Is our mystery man connected to the Seward family or Lewis Paine/Powell?

Gene, yes, the connection is to Lewis Powell.

It's Rev. Abram Gillette, Lewis Powell's spiritual advisor.