Rizal traveled extensively in Europe from 1888-1889, visiting London, Paris, and cities in Spain. In London, he stayed with Dr. Antonio Ma. Regidor and befriended Dr. Reinhold Rost, who had a collection focused on the Philippines. Rizal manually copied and annotated Morga's rare book on the Philippines. He also became honorary president of the pro-Philippines La Solidaridad society. His travels also included brief visits to Paris, Madrid, and Barcelona, where he met Marcelo H. Del Pilar for the first time.