Possible Clues:

• Went underground with Albert to go for the Spanish noble
• State north of Mexico City
• Lowly Spanish nobleman in Mexico
• Concealed the concealed goal in Spain
• Spanish nobleman of the lowest class
• Spanish noble happy back in US state, but not initially
• Spanish gentleman's secret goal, perhaps
• Concealed the goal that's been concealed by him in Spain
• So glad I hurried, showing around Spanish gentleman
• Spanish aristocrat