Colin writes:

Ah,but despite those authentic-lookiing sepia tones, Dan, your image that accompanies this posting is a negative -> positive modern-era enhancement, and not what would have been seen centuries ago, either on the full Shroud or a framing of the head alone (Mandylion).

Oh, gee, Colin, what was I thinking? BUT, if you will look closely at the following picture you will discover that the shroud is not a scorch but an accidental miracle that occurred when a farmer covered his garden one night to protect it from the frost. To see this picture in all its glory, you’ll need to step back about five feet and squint your eyes.