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March 14， 2001
Dear Mr。 Li:
I am sorry that I must apologize for not being able to help you when you asked me to give you a letter of introduction to the director of the National Institute of Oncology of my country。
Unfortunately I didnt see Director Tom Carter of the National Institute of Oncology those days and I had no chance of mentioning your name to him。 Because he was in a hospital。
I will certainly mention you if I happen to run into him。 I hope you will do well in your research work。
Yours sincerely，
E。S。Jones(Signed)