Legal Question in Real Estate Law in Texas

you could file adverse possession...but not without a lawyer IMHO....to be successful...but as you may know anyone can file a suit...but not everyone can win..call if you wish to discuss..no fee for consultation

Adverse possession does not fit your facts -- if your parents bought the adjacent land, then they own it, and it's a matter of proving title by performance. Was the property bought for cash, financed by the selling company, or third party financed? Do you have any records of payments on this adjacent property? A copy of the contract to buy both properties? What sort of will did your parents write? Are you and/or your brother independent executors? It may be as simple as filing suit on the successors of the selling entity to establish that the original deed was mistaken in leaving off the adjacent property -- the tricky part may be identifying and locating the successors. Simpler still would be if those successors wold make you a deed. Another route would be to get a title company to set out the conditions they require in order to insure title in you and your brother -- which may well include a suit or successor deed as mentioned above. As far as taking care of it without a lawyer, I agree it's unlikely. You have to evaluate what the value of the property is versus the legal cost involved. At the end of the day, you need an insurable title before you can do anything with this land.