It sounds good.
You should nevertheless create a more detailed page for "What's new on the Athenaeum?", where deleted works for duplication could be displayed in order to let everyone to see, as well as other edits such as new pictures, dimensions, etc.
I was thinking the same:
1. When additions or changes are made to an existing artwork (for example adding dimensions, dates etc) perhaps a record should be included with the name, date and description of the amendment/addition. Example:
Work completed by (name) on (date)
Edited by (name) on (date) with : dimensions, medium used, date completed;