| 41. | The prototype was converted from a IV ( 402 built ).
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| 42. | Due to these problems, together with Hartz I-IV.
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| 43. | Himmler appointed Heydrich commander of Department IV, the political police.
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| 44. | The Holy Roman Emperor Charles IV refused to recognise the title.
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| 45. | Siemowit IV of Mazovia resigned his claim to Poland in December.
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| 46. | Many mixed lead ( II, IV ) oxides are known.
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| 47. | He was pardoned at the accession of Edward IV in 1461.
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| 48. | The cooperation between Henry IV and King Ottokar II was exemplary.
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| 49. | King Charles IV of Spain had been an ally of France.
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| 50. | Edward IV then incarcerated Henry VI in the Tower of London.
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