I should say one more thing about Marbury to be clear. The holding itself is disputably correct.

What Marshall says is that the constitution only granted SCOTUS original jurisdiction in certain types of cases. In all others, it had appellate jurisdiction. If you read Art. III, he's right.

Congressional statute on the otherhand granted SCOTUS original jurisdiction in the case. This was contrary to. Art. III.

Thus, the statute was unconstitutional and Marbury filed in the wrong court.

On a side note, John Marshall was the person who was tasked with delivering Marbury's commission when Marshall was secretary of state. 😏