Hi,
There were three sentences with differing articles, which one (or ones) is (are) right?
1. He is the ex-curator of a museum of prehistoric cave painting.
2. He is ex-curator of a museum of prehistoric cave painting.
3. He is an ex-curator of a museum of prehistoric cave painting.
The expert seems to favor #1 and #2, but wondering why not #3? Mr. Micawber, the expert, will might put aforth the argument that there are very few cave painting galleries around and certainly only one in the sepaker's range of context and it also is a title, as he did on one other post, so #1 and #2 are tthe ones he favor. But how about #3, can it be acceptable too?