- Thank you for the answer of Hyginus.
I have have looked further of the matter. The Swedish author wrote
about the explanation of Castra
the second description of castra is devoted Hyginus, during Trajanus
(the first Polybios), but are probably younger, possibly from the
beginning of the 3 century AD (the author a latinian HR Törnebladh
I am interested of the name of the work!