Washington (CNN) With the reach of TV cameras in the Senate chamber limited to close-ups of the speaker, there's a lot happening at the impeachment trial of President Donald Trump the public can't see.

For instance, as House managers showed a video clip of Republican Sen. Lindsey Graham on Thursday, the senator was actually not present. But viewers would not know that.

Sketch artist Bill Hennessy has been at the trial this week. Here's what he saw on Day 3:

Chair of Sen. Lindsey Graham, R-South Carolina, as Democrats play a quote of his during impeachment trial; January 23.

House Judiciary Chairman Jerry Nadler speaks at the Senate impeachment trial; January 23.

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