Thanks for the link steve2.
"What happens to us when we die?" was among the questions the letter asked.
"I opened it and I was really devastated, I was really f...ed off," Sergent-Shadbolt said.
This might not be an unusual reaction (in spite of what WT writes of course).
And yes, housebound JW's were sometimes encouraged to do so (only now seeing sir82's comment), although I could not find direct instructions to do so. It is just acknowledged as a way of giving testimony.
If you still have the WT Library cd-rom, just search for "obituary" and you'll find stuff like this:
*** km 1/70 p. 8 par. 3 Presenting the Good News—By Letter ***
So the brother gave his name and address to this sister, who continued to develop the interest by mail. Some names she gets from the obituary column.
*** yb95 p. 47 Worldwide Report ***
Now 94, she is still busy witnessing. Recently she completed a year of auxiliary pioneer service. She is able to walk a little with a cane—enough to take advantage of the opportunities presented when neighbors, friends, relatives, salesmen, postmen, or anyone else calls. Still she has to do most of her witnessing with a pen. She finds names and addresses in the obituary columns in the daily paper and writes to some of these. How happy she is when replies of appreciation come!