How to transfer property after death in different states

My father in law expired without any registered will. He had two daughters, one is my wife and another died 4 years ago and even his husband died 3 years ago leaving behind 2 children who are currently minor and are living with their grandmother. 1. My father in law has a inherent property in delhi which was sold to him on papers from her mother and there is a will too made showing that this portion of the property belongs to my father in law but this deed is also not registered nor is the will. 2. Another self purchased property is in Vaishali, Ghaziabad, Uttar Pradesh. 3. My father in law had made a will giving both the above properties in my wife name as the other daughter had expired but that will is also not registered. Please tell the procedure to get these properties.