Complex sentence: He presented to the United Kingdom of Great Britain and Ireland the Scottish National Portrait Gallery, opened in Edinburgh in 1889, and costing over 70,000 pounds sterling; and he contributed largely to the collections of the National Gallery of Scotland.
Split into simpler sentences: He presented to the United Kingdom of Great Britain and Ireland the Scottish National Portrait Gallery, opened in Edinburgh in 1889, and costing over 70,000 pounds sterling. He contributed largely to the collections of the National Gallery of Scotland.