Read the short story: Professor Eldridge began his archaeological expedition in Egypt on January 5th, 1922. His team spent three months excavating a newly discovered tomb. On April 10th, they unearthed an ancient scroll. The scroll took two weeks to decipher, and its contents revealed the location of a hidden city. They set off to find the city on May 1st, and after a month of travel, they finally reached it on June 1st, 1922. Which event happened between the unearthing of the scroll and the journey to the hidden city?
A) The start of the expedition.