Losing contact with old friends

Losing touch with friends shouldn't happen but unless common bonds refresh an acquaintence friends recede into the background. After a few months when contact is made I expect an answer. When none comes what can I do? I've lost touch with a wonderful friend in Hungary. No response came from her home address. Her university e-mail was not rejected but no answer came. I assume she left her teaching position at the Agricultural College in Godollo. Will I ever hear from her again?
I no longer hear from an old friend and fellow scout leader who lives in Culebra, an island in Puerto Rico. Out in the hills there is no telephone available but I had no response from her Post office box. I know Bill Young was not is great health in 1992 but their attachment to the Awesome Finca would have kept them there I think. Nancy Lawrence disliked living in the states. She hated visiting the states but did so on several occasions when I was available to house-sit and care for the animals.
My tour guide to United Nations China NGO Conference is busy lecturing and writing so I'm not surprised she does not respond to my latest query. She was more than a little upset at her failing health after she turned seventy. She was a wonderful companion to Uganda for the eighth International Interdisciplinary Congress on Women and all points in between there and the Oldupai gorge. She lives in California - a place to which I can drive so I can run her down easier than Elizabeth in Hungary, or Nancy in Puerto Rico.
Maybe my next effort in communication will bear fruit, or at least a reply.

Naomi Sherer