Case law in the case of Dean v. Dickey provide several similarities to that of your case and to the facts given. In this case the will itself was not completely handwritten by the testator and half of it was typed; additionally, there was only one witness to attest to the signing of the will. As previously stated, Texas law states that every last will and testament must be in writing and sign by the testator with a witness present. If by chance the will is not handwritten wholly by the testator, it must be attested by two credible witnesses. In the case of Dean v. Dickey, probate was denied by the court for the reasons discussed above. Please accept my apologies that the answer may not have been as beneficial to your challenge as you expected.