We know that in 1928 Sigurjn lafsson took with him a portrait bust of his mother when he was admitted to the Royal Academy in Copenhagen This particular work seems to have been lost

What is the correctly punctuated version of this sentence?
We know that in 1928 Sigurjon Olafsson took with him a portrait bust of his mother when he was admitted to the Royal Academy in Copenhagen. This particular work seems to have been lost.