Your friend has recently recovered from an illness. Write a letter asking him to come and spend some time with you for a change and rest.
61/7, Model Town,
New Delhi – 110 009.
September 2, 200__
I received your letter yesterday and I am glad to learn that you have recovered from your illness.
You have mentioned that you are feeling depressed after the long illness. I suggest it would be nice if you come and stay with me for a month for rest and change of scene. These days the weather is very fine and the air is fresh and cool. It will be an ideal place for you. Moreover my cousins Ravi and Rati have also come here. They will be pleased to meet you. I have told them a lot about you.
Let me know about it.
Closing on the hopeful note of hearing from you soon.