I'm playing through Heroes 3's campaigns and on the previous scenario I had 2 pieces of Charm of Mana and a Pendant of Life on my main hero at the end. I explored the map, acquired all items but I was not able to get past a border guard at the bottom right corner (he wanted The Speculum).
The artifacts mentioned above however are rewards beyond previous border guards so I don't get it. Why don't they appear when I progress onto the next scenario? And where can I find the Speculum?