What important new does Mr Lorry convey to miss manette?

Mr. Lorry conveys to Miss Manette that her father, Dr. Manette, has been found alive and is being brought back to England. He explains that Dr. Manette has been kept in prison for 18 years but is now rescued and safe. This news is significant for Miss Manette as it brings hope and relief after years of uncertainty about her father's fate.