Death of my doctors child

Dear Limo Princess,
My cardiologist, whom I've known for a decade or more has been pregnant with her second child over this past year. After delivery the baby developed complications and lingered in deteriorating health for three long months till he passed a week or so, ago. Although we are not close on a social basis, and aside from her obvious condition during her pregnancy and prior conversations about the new birth, baby names, its sex, how excited the sibling was etc. - she has not spoken about it since she has returned to her work after giving birth. She is in her early 30s and I in my late 80s. Our relationship is mostly professional, but she is dear to me on some level. She owns some of my art work and we have corresponded frequently over the years. I would like to express my condolence but know not how or the proper response, if any. Any help would be appreciated.
Kindest regards, Benno

Dear Benno,
A note from the heart will mean more to her than anything. I have tears in my eyes just from reading about your relationship and I am sure that you can write a note expressing your sympathy and support and it will mean a lot to her. Write it on your stationery in your own hand and mail it to her at home if you know the address and at her office if you don't. There are no words that will ease her heart at this time, but knowing that there are people who care enough to send a note will help her heal.
Sincerely,
Limo Princess