How to write a letter to Brother to come immediately to illnesses of your father.

16 shakespeare Sarani,

Kolkata- 17

17th February, 2019

My dear Suman,

Father is seriously ill. He is been suffering from high temperature, severe headache and other ailments for the last four days.  Dr. Roy suspect there has been some viral infection.  Moreover father is not responding to any medicine.  So he has been admitted to hospital today under our doctor's advice. Mother has become extremely nervous.  We all feel helpless without you. Please cone home immediately.
With love,

Your affectionately, 

Sumita

Sri Kuntal Laha
Badarpur
New Delhi- 110044