After punctuating and capitalizing the passage, it becomes:
1. Mannie Dookie, a top-class runner who was born at St James in 1915, made his entrance early on the sporting scene. At twelve, the youth's running abilities were discovered. At fifteen, he was defeating much older runners. Unable to afford to buy shoes, he ran barefooted, and became known as the Barefooted Runner. Read more about him in "Heroes of the People".
Explanation:
We must capitalize the first word of each new sentence after a period. Proper names such as people's names or names of countries must also be capitalized.
Whenever we finish a complete thought and start a new sentence, we must use a period.
The use of commas unfolds into different rules. For instance, when we add an appositive to a sentence, that is, a word or phrase that explains another word, we place it between commas. Commas are also used to separate items in a list, even if each item is an entire clause. Commas also separate introductory phrases from the rest of the sentence.
