When reconstructing the sources of the Theodosian Code, it is useful to put the thesis, that local archives were used, to the test and reconstruct such a local archive on the basis of the addressee. It appears in the provided example that the letters must have been taken from the imperial copybook of outgoing letters. Further, Seeck reconstructed sometimes the place where a text was issued on basis of the itinerary of the emperor. In the example taken, it appears that Seeck was rather casual in his assumptions on the speed the emperor traveled or could have traveled and that another route, which would necessitate less emendations, is also possible. His Regesten show in this respect a critical weakness.