This may be news to some, and just a reminder to most. However i was messing around on my tablet a few days ago and found something i thought was kinda cool. I have an android tablet (i assume its the same type of thing with apple) and in the playstore if you don't already have it on your device is an app called play books. (Down load if you dont have it its a free app.)In the play books app at the top you can search for anything related to gold mining that you can imagine from the dept. Of the interior's survey reports for placer and lode deposits (historic of course) to the first gold finds in colorado dated way back to the 1860's. The best part its all FREE to download. Im a big history nerd so its like christmas to me....lol, anyway check it out if you have a chance. ☺