Ghost or photography trick? Take a close look at this photo

An old photo is finding a new life, or is it afterlife, online.

An image of female linen mill workers has recently come to light.

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It is like any photo from the early 1900s, black and white and grainy, but there's one part of the picture that is making some question what they're seeing.

If you look closely at the last girl on the right, in the second row, there's something that could be considered a little creepy.

Look closer:

The girl on the right has a hand resting on her shoulder. But there's no person connected to the phantom hand.

So is the photo a century-old photography trick, a camera or developing glitch, a present-day Photoshop or something otherworldly? You decide.