In piece of study the collection of poems of the Poet Moosa Bin Hussain Bin Shawal Al Hussaini – also known as "Al-Kithawi" will be studied and investigated. There are many reasons for the study of this poet. One of the most important reasons is that it has not been studied nor investigated before. Undoubtedly, its study and investigation will offer a active literature subjects for researchers and it will be significant addition to the Omani library, especially that this poet is a figure of the old poem. I have divided the subject into two sections: the first is an introduction to this study and it focuses on the age in which the poet was living, his life, family, culture and objectives of his poems. In addition to that, the introduction focuses on the aesthetic aspects of his poem and a description to manuscripts and also the results of this study. The second section focuses on the manuscripts which we could found from the poems of Al-Kithawi. The study of such manuscripts follows the methodologies used in investigating such poems and they are as follows: 1- Assessment of the reading of the poem according the poet's perspective 2- Proofing manuscripts and correction 3- Introducing numbers for poems and verses 4- Interpretation for journalism and media. 5- Explanation of strange words 6- Explanation to the difference between copies of the poems Putting vowel points on words.