What did Ostian script look like? I've seen some drawings in Origin of the Serif and I'd like to learn more. But when I tried googling I wasn't able to find anything: all I got were false positives.
The example on Figure 212 of Catich's book shows a Roman majuscule A and N, which are described as Ostian inscriptions of the year 75. Both are in the Vatican Lapidary Museum.
Compared to Trajan, the height-width ratio of the letters is smaller. The right leg of the A is very thick, with a very long exit serif.