This information is good and legitimate for ALL maps of the Spanish, Catholic Church, Mormons, Jesse James (and other outlaw groups), Masons, etc. In other words, ANY Map that has a Duck symbol on it, or the number "39" (the number of the Duck), will use this coded technique to fool you and lead you astray, whether it be a symbol-style map, letter-style map, etc.
You should already know about the fact that the Duck symbol is telling you to "be careful, that the true treasure trail "ducks" out on you" and leaves you wondering around going nowhere. You should also know that the duck symbol is telling you exactly what point the treasure room/mine is located at....the very first step of the treasure trail...the Alpha.
It is for this reason, (knowing that the duck tells you that the treasure/mine is at the first step), that maps using this duck symbol have done something to really "give it to you", to really screw you up in the field. All other maps (that do not use the duck) will lead you to the Alpha, and you simply make your way along the treasure trail until you come to the spot where the covered opening is located. But in the case of these duck maps, knowing that the treasure is at the first step, they "slip it to you" by showing you an alpha, however, it is a false Alpha. Oh sure, the Alpha exists, but not in the place where the map shows it. What you actually have to do is make it to the second step of the maps' directions and then "back pedal" to the actual Alpha site. It's really quite ingenious, to say the least. So, if you have a "duck map", forget about the Alpha shown on the map, and go to the second step given on the map, then locate the alpha (treasure room) from there.
I already know many of you have been reding my posts and have been getting close to a treasure room, or at least you thought you were. I can tell by the e-mails that you need this bit on info, so I am releasing it.
Hope it helps you get to your treasure.