DR. MANUEL A. QUISUMBING (August 25, 1892 – January 11, 1969) A well-known chest physician who was appointed Chairman of the Board of Examiners of Medicine by President Manuel L. Quezon. He was later appointed as the Second City Mayor of San Pablo in February 1941 since Dr. Potenciano Malvar stayed in office for only one month. But he abandoned his position during the Japanese Occupation to avoid prosecution on suspicion that he was supporting the guerilla movements in the area. He was also granted by the succeeding Presidents of the Republic of the Philippines as “Ambassador at-Large” so he can travel abroad with ease to attend conferences on medicine, particularly on tuberculosis. Dr. Manuel A. Quisumbing prepared a formula for the preparation of ink originally being produced and distributed by Philippine Ink, Incorporated before World War II, and when the researchers of Parker Pen of U. S. A. observed that Quisumbing Ink “clean your pen w...