What does Mr. Lorry have to do now? Why is Darnay opposed to this plan? Why is Mr. Lorry determined to do it anyway? (From Book 2 Chapters 21-24)

Tellson’s has decided to send Mr. Lorry to its Paris branch.They want their valuable ledgers, papers, and records before they are destroyed in the revolution. Charles Darnay visits Mr. Lorry at Tellson's to try to dissuade him from traveling to Paris. People with money are frequently killed in Paris and Lorry could easily be killed. Mr. Lorry says he will be okay as long as he brings Jerry Cruncher as his bodyguard.