Complex sentence: In response to the President's instructions, Barber wrote Norris that the design for the eagle had been awaiting approval since July, making no mention of the Mint's desire for sharper die work.
Split into simpler sentences: In response to the President's instructions, Barber wrote to Norris that the design for the eagle had been awaiting approval since July. He made no mention of the Mint's desire for sharper die work.