The thrust of this paper is to delve into the cohesive devices of political discourse as it pertains to Nelson Mandela‘s <i>I Am the First Accused</i>. The text was codified and the lexico-grammatical resources were examined in terms of semantic ties through the lens of Discourse analysis. The text was analysed based on Halliday and Hasan’s, 1976 five major cohesion classification categories<i>: r</i><i>eference,</i><b> </b><i>demonstrative references,</i><i> </i><i>substitution</i><i>, conjunction and lexical cohesion</i>. The research indicated that there were sufficient phenomenon-example relationships within the text. In other words, there was adequate justification for claim statements within the text. There are also adequate cause-consequential relations in the text. Anaphoric references were commonplace in the text. It was also found out that cataphoric reference was sparingly used in the text. Analysis of the data also revealed that there were 30 instances of personal references, 21 demonstrative references, 3 instances of comparative references, and 6 instances of substitution. There were no instances of ellipsis. There were 7 instances of conjunction as a semantic link. There were 15 instances of repetition, 5 examples of synonyms and 3 instances of antonyms. It is recommended that public speakers and media practitioners take cognisance of cohesive devices and make their write-ups and speeches more cohesive and coherent for their audience and readers to decode meaning. Teachers of English as a second language should give serious attention to the teaching of cohesion as a semantic link within a text since cohesion and coherence aid the readability of a text. Cataphoric references sustain the interest of listeners and readers since they expect information yet to be given. Therefore, it is recommended that teachers of English as a second language should encourage their students to use some cataphors in their essays to create some kind of suspense in their readers. Critical Discourse Analysis (CDA) could also be used as an analytical tool to examine how power plays within the text.