Looking for a McKay - emigrated from Ulster

[PPS]

Another update to my search for details on this person.

I found an obituary in the Lindsay Post for a Dorothy Ethel McKay, widow of the late Andrew McKay. She died at the end of April in Ancaster, Ontario at the age of 85.

If it is the same person as named in a couple of newspaper articles of the period, then I have the names of some of their children. By using Whitepages I have found possible addresses of a daughter and a grandson. I did take the liberty of leaving a message on an answerphone, but there was no returned call.

Now the question is - do I take the bull by the proverbial and try and contact them in writing, leave it a little longer, or not contact them at all?

Although I would like to take this further for my friends sake, I do not want to cause alarm or distress to them no matter if they are the right family or not.

Paul.