Sorry no help here. I see a Pasquale on the Aquilina side but not the Agius and there's no Salvatore on the Aquilina side.

There's a Felice Agius married to a Elena Galea 25 Aug 1857 in Mdina, Malta d/o Salverio & Angela (Delicata)
It seems Aquilina and Agius are very common names in Malta.