This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason: Public domainPublic domainfalsefalse This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain". This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.

Tweaking:

I have "lightened" the image in order to compensate for the fact that it will have spent approximately the first one hundred years of its life in a pre-electric house, and will therefore have been darkened by candle smoke and fire smoke. The result may horrify purists, but I think it makes the image more suitable for use as a portrait in a wikipedia entry, especially for those people, bizarrely, who choose to consult wikipedia using a hand held telephone with a screen that is just a few centimeters in width.