Original sentence: This tradition is thought to be from the Egyptians, who believed this finger to be the beginning of the vena amoris ("vein of love"), the vein that leads to the heart
Edited sentence: This tradition may have originated from the Egyptians, But was initially  to be first practiced on the fourth finger by the Romans, who believed this finger to be the beginning of the vena amoris ("vein of love"), the vein that leads to the heart