1. Whether it is true or not, according to the statement of the petition, that he has in his custody, or under his restraint, the person named or described in such petition;

2. By virtue of what authority, or for what cause, he took and detains such person;

3. If he had such person in his custody or under restraint at any time before the service of the writ, and has transferred him to the custody of another, he shall state particularly to whom, at what time, for what reason or by what authority he made such transfer;

4. He shall annex to his return the writ or warrant, if any, by virtue of which he holds the person in custody; and

5. The return must be signed and sworn to by the person making it.

Acts 1965, 59th Leg., vol. 2, p. 317, ch. 722.