Complex sentence: Thomas made her first visit to Egypt within a year of her graduation, with Thomas Cook & Sons, in order to placate her family, who didn't consider Egypt a safe place for a young woman to travel unescorted.
Split into simpler sentences: Thomas made her first visit to Egypt within a year of her graduation. She made her traveling arrangements with Thomas Cook & Sons in order to placate her family, who didn't consider Egypt a safe place for a young woman to travel unescorted.