Einstein would say his years in Zurich were the happiest ones of his life. He met many students who turned out to be very loyal friends. He also met his first wife, Mileva Maric, a fellow student from Serbia. After he graduated from the institute, he faced a series of life crises over the years. Because Einstein loved to study on is own, he cut classes. This angered the professors. One in particular, Heinrich Weber, wrote a letter of recommendation at the request of Einstein that later led him to be being turned down for every academic position he applied to. All the while, Einsteins relationship with Mileva deepened. But his parents opposed the relationship. Einstein fought his parents and continued to see Mileva. In January 1902, the couple had a daughter, Liesrl, who either died of sickness or was given up for adoption (the facts are unknown at this time). At this point in time, Einstein possibly reached the lowest point in his life. He could not marry Mileva without a supporting job, and his fathers business has gone bankrupt. Very desperate and jobless, Einstein took low paying jobs tutoring children, but was unable to keep any of them. But a blessing came when a friend of Hermann's offered Einstein a job as a clerk at the Swiss patent office in Switzerland. At the same time, Einsteins father became seriously ill and just before he died, he gave his blessing for Einstein to marry. Einstein married Mileva on January 6, 1903. In 1904, they had their first son, Hans Albert. In 1910 they had their second son, Eduard.