The Texas wills only allow the latest will to be applied. That is if the testator had three different wills then only the one which was written just before his passing on will be considered. The other two wills are viewed as expired or invalid. The law therefore has to make sure that a will and statement is the last one before they proceed and give out property.
If one decides to make a holographic will then they do not have to have a witness present at the time of making it. The maker however does have to do it with the help of a notary though. All the law requires is that the will be written by the makers hand and signed. When it is time for the reading somebody will have to prove that the will is in his handwriting. It is always a good idea to follow the Texas will forms that are readily available from many resources.