De tranquillitate animi

[Matthaeus]

Rex es: non ad Croesum te mittam, qui rogum suum et escendit iussus et exstingui uidit, factus non regno tantum, etiam morti suae superstes; non ad Iugurtham, quem populus romanus intra annum quam timuerat spectauit:

Is this a relative pronoun? A mistake?

 

[Pacifica]

It's the relative adverb. The phrase is hard to translate literally but the idea is "within/barely a year after they had feared him".