Property is indexed. Possible indexes are from 1 to 50.

Using the index, this property outputs the delete date of the other deleted objects which were placed at the same place as the deletion marker. In other words, the delete date of the second deleted object is output using the index [1]; the delete date of the third deleted object is output using the index [2] etc. The first deleted object has the highest index value. (The delete date of the last deleted object is output to the "Delete date" property (ID 36603).)

Reference

DeletedObjectInfoPropertyList Class
DeletedObjectInfoPropertyList Members