Scrooge’s character towards Fred at the beginning of the novel is ‘as solitary as an oyster’ because he doesn’t celebrate Christmas and doesn’t want dinner with his family that ask him every year whereas in the end of the novel he is no longer solitary and invites himself which shows he has clearly changed.
The Treaty of Vienna of 25 March 1815 was the formal agreement of the allied powers — Austria, Great Britain, Prussia and Russia — committing them to wage war against Napoleon until he was defeated.