There should not be any surprise about Robert Crisp seeing Bardia

The copy of Brazen Chariots that I have shows a map of teh Crusader Battle. Bardia is less than 10 miles north of the eastern end of the Trigh Capuzzo. In the chase after the attack on the motorized transport on the Trigh, Robert's squadron ran farther north and he and his troop came up to the drop from the plateau down to the sea, overlooking a town. The map shows that the town he saw had to be Bardia, just to the northwest up the coast from Sollum. And yes, the Stuart tank was a good adversary for German armoured cars and light tanks. The Stuart was fast enough to compete with the armoured cars and had a better gun and greater speed than the Pzkw IIs that the Germans were using. They also had a few of the very inadequate Pzkw Is with just machine guns. At least the Pzkw II had a 20mm cannon.