Hola Bookaroo
My apologizes for not replying earlier to your question. I had and Environmental protection audit to my vessel as she is licensed to carry dangerous goods. Without the audit I would be subject to higher port fees in some ports.
Now in regards to your question of the source. It was Smithson museum. It was part of a fantastic collection of documents on the Alaskan gold rush.
You will notice in the map a cabin

? You might be closer to the truth that his story might of been the source of a few lost cabin treasure legends.
Hola sdcfia
This map is indeed the real deal treasure map. While today not worth much except as a historical curiosity.But if some one claims there is no such thing as a treasure map you can beg to differ? .
I totally understand the point you made in question of many alleged maps. This one was just plain and simple not trying to present itself as old. it came with letter written to his sister.
The value of this treasure map is immense,back in 1896 men would of killed for it. In fact it was from the actions of the writer of this map George Carmack that sparked off a stampede of 100000 prospectors to Alaska.
the prospector George Carmack had married local native American women. They allegedly discovered gold with his wife and brother in law pictured while trapping along a creek called Rabbit Creek later to be renamed Bonanza Creek in 1885.
Gault, Ulrich and Ole was there a year before in 1884 but was chased out by the Han natives. most like the native feared the three men competing against food sources in the area.
Yet although there is controversy of who actually discovered the gold first. George Carmack was the first to register a legal claim.
Mal