===Horace Slughorn===Horace E. F. Slughorn is the long-serving Potions teacher and Head of Slytherin House since at least the 1940s, until his retirement after the 1980–81 school year.
=== Horace Slughorn ===Horace E. F. Slughorn es profesor de Pociones y Jefe de la casa de Slytherin desde al menos la década de 1940, hasta su retiro después del año escolar de 1980-81.