Dramatis Personæ
| Basilio | King of Poland. |
| Segismund | his Son. |
| Astolfo | his Nephew. |
| Estrella | his Niece. |
| Clotaldo | a General in Basilio’s Service. |
| Rosaura | a Muscovite Lady. |
| Fife | her Attendant. |
| Chamberlain, Lords in waiting, Officers, Soldiers, etc., in Basilio’s Service. | |
The Scene of the first and third Acts lies on the Polish frontier: of the second Act, in Warsaw.