Answer:
I was present at the sessions of the great Congress in the month of December.
Step-by-step explanation:
Ethos refers to a rhetorical device in which the author appeals to his credibility and experience in order to provide support for his position. In this example, the author tells us that he was present at the sessions of the great Congress in the month of December. This is explained in order to show that the author can be trusted to talk about this topic.