What follows is an opinion from a United States Court of Appeals. Your task is to identify the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court).

Opinion:
Norman Lee PLEDGER, Appellant, v. UNITED STATES of America, Appellee.
No. 13593.
United States Court of Appeals Sixth Circuit.
Oct. 25, 1958.
A. Lawrence Sherman, Lexington, Ky., for appellant.
Henry J. Cook and Marvin D. Jones, Lexington, Ky., for appellee.
Before MARTIN and MILLER, Circuit Judges, and CECIL, District Judge.
PER CURIAM.
Appellant filed this habeas corpus proceeding in the District Court for the Eastern District of Kentucky alleging that he was being illegally held and detained against his will in the United States Public Health Service Hospital at Lexington, Kentucky. He challenged the validity of the judgment under which he was being held in confinement on the grounds that the evidence was insufficient to support the verdict of guilty, entrapment by federal officers, and that he was mentally incompetent at the time of trial.
The District Judge sustained the Government’s motion to dismiss the action on the ground that it lacked jurisdiction in the case and entered an order to that effect on August 2, 1957. Appellant wrote a letter to the District Judge, dated October 13, 1957, which the Court treated as a motion for rehearing, which motion it overruled by order of October 16, 1957.
By letter of April 28, 1958, the appellant sought a rehearing of the ruling of October 16, 1957, which application was denied by order of May 1, 1958. Notice of appeal dated May 5, 1958, was filed on May 7, 1958.
It appearing to the Court that the appeal was not timely, Sec. 2107, Title 28 U.S. Code; Marten v. Hess, 6 Cir., 176 F.2d 834; Deena Products Co. v. United Brick & Clay Workers of America, 6 Cir., 195 F.2d 612; Morley v. United States, 6 Cir., 207 F.2d 654.
It is ordered that the appeal be and is hereby dismissed.

Question: What is the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court)?

Choices:
Trial (either jury or bench trial)
Injunction or denial of injunction or stay of injunction
Summary judgment or denial of summary judgment
Guilty plea or denial of motion to withdraw plea
Dismissal (include dismissal of petition for habeas corpus)
Appeals of post judgment orders (e.g., attorneys' fees, costs, damages, JNOV - judgment nothwithstanding the verdict)
Appeal of post settlement orders
Not a final judgment: interlocutory appeal
Not a final judgment: mandamus
Other (e.g., pre-trial orders, rulings on motions, directed verdicts) or could not determine nature of final judgment
Does not fit any of the above categories, but opinion mentions a "trial judge"
Not applicable (e.g., decision below was by a federal administrative agency, tax court)

Answer: 4