10、Pray give my best remembrances to Mr. Brown. 

11、My parents ask also to add their best thanks to mine. 

12、Adieu till then. 

13、Thanking you for the past favour. 

14、I think you for the trouble you have taken. 

15、Hoping you will have a pleasant trip. 

16、Wishing you a pleasant journey. 

17、The help you sent is sincerely valued.