<rebus or acrostic poems, where the first letters of the lines, read downwards, spell out a word or
phrase.>

Bridget, there was a famous example of this in The Bulletin (for non-Aussies, an Australian weekly) in the 1960s (I think). Since I read your post yesterday, I've been searching the house trying to locate the issue. Any other Aussies around then who remember this and, more importantly, can find a copy?