Complex sentence: Rovelstad went to Philadelphia to witness the initiation of production and stayed in the home of Mint Chief Engraver John R. Sinnock; the first ten pieces were handed to the sculptor, who placed them in paper envelopes and took them home to Illinois.
Split into simpler sentences: Rovelstad went to Philadelphia to witness the initiation of production and stayed in the home of Mint Chief Engraver John R. Sinnock. The first ten pieces were handed to the sculptor, who placed them in paper envelopes and took them home to Illinois.