The orthography of the language, and especially the adoption of the Latin alphabet, seems to have troubled the few writers of this period exceedingly. They appear to have founded their principles alternately on the Latin, the Bohemian, and the German methods of combining letters; an inconsistency, which adds greatly to the difficulties of modern Slavic etymology.[15] In 1828 a remarkable manuscript was published under the title, _Pamientniki Janozara_, or Memoirs of a Janissary. It was the journal of a Polish nobleman, who had been induced by circumstances to enter the Turkish army during the siege and conquest of Constantinople, an event which took place A.D. 1453. This interesting document of a language, that is so remarkably poor in ancient monuments, was no longer intelligible to the common Polish reader. It was necessary to add a version in modern Polish in order to make it understood. Annalists of Polish history, who wrote in Latin, were not wanting in this period. Sig. Rositzius, Dzierzva,[16] and more especially John Dlugosz, bishop of Lemberg, wrote histories and chronicles of Poland; and the work of the latter is still considered as highly valuable. THIRD PERIOD. _From Sigismund I, to the establishment of the schools of the Jesuits in Cracow. A.D._. 1505 _to A.D_. 1622. In northern climates, the bright and glowing days of summer follow in almost immediate succession a long and gloomy winter, without allowing to the attentive mind of the lover of nature the enjoyment of observing, during a transient interval of spring, the gradual development of the beauty of the earth. Thus the flowers of Polish literature burst out from their buds with a rapidity unequalled in literary history, and were ripened into fruit with the same prodigious celerity.