I believe you are referring to the case Holmes termed "that little affair of the Vatican cameos" he was involved in at the time of Sir Charles Baskerville's death. In that case, Holmes probably went to the Vatican; otherwise, I am not sure to what you are referring.
Switzerland, specifically the Reichenbach Falls near Meiringen during 'The Final Problem.'
They also stayed in Norway for a time after 'The Adventure of Black Peter.'
1912
Sherlock Holmes often did not reveal his deductions or plans even to Watson until the case was complete. In this particular case, he needed Watson to believe a certain way, so he would convince someone to visit Holmes. Holmes also knew that Watson was not a good actor.
1. Holmes' first case 2. Watson's wounding in the battle of Maiwand 3. Holmes/Watson meeting 4. Watson's first marriage 5. Watson's meeting with Mycroft Holmes 6. Holmes' and Professor Moriarty's struggle at Reichenbach Falls 7. Holmes' return 8. Watson's second marriage 9. Holmes' retirement 10. Holmes' last case
"My friend and colleague, Dr. Watson" or, sometimes, just "my friend, Dr. Watson."
John Watson.
Holmes and Watson went camping together. In the night, Holmes asked Watson, "Watson, look up and tell me what you see." "Well, Holmes, I see lots of stars, the moon is waxing, and there is a hint of clouds in the west. Why, what do you see?" "I see that someone has stolen our tent."
Sherlock Holmes often did not reveal his deductions or plans even to Watson until the case was complete. In this particular case, he needed Watson to believe a certain way, so he would convince someone to visit Holmes. Holmes also knew that Watson was not a good actor.
1. Holmes' first case 2. Watson's wounding in the battle of Maiwand 3. Holmes/Watson meeting 4. Watson's first marriage 5. Watson's meeting with Mycroft Holmes 6. Holmes' and Professor Moriarty's struggle at Reichenbach Falls 7. Holmes' return 8. Watson's second marriage 9. Holmes' retirement 10. Holmes' last case
"My friend and colleague, Dr. Watson" or, sometimes, just "my friend, Dr. Watson."
John Watson.
Holmes and Watson went camping together. In the night, Holmes asked Watson, "Watson, look up and tell me what you see." "Well, Holmes, I see lots of stars, the moon is waxing, and there is a hint of clouds in the west. Why, what do you see?" "I see that someone has stolen our tent."
Your question is incomplete. Who came in what episode? Several people came to visit Holmes in various episodes.
Dr. John H. Watson shared lodgings with Sherlock Holmes and became his friend and colleague and his chronicler.Dr. Watson, who tells most of the accounts of Sherlock Holmes solving his cases.Doctor John H. Watson was a trusted friend and colleague of Sherlock Holmes and most of the stories are written as if told by him.His name is Dr. Watson.Dr. Watson, a military man and Holmes fellow lodger.Doctor Watson
The Sherlock Holmes stories were usually narrated by Dr. John Watson, Sherlock Holmes' friend and companion. Watson was a doctor and war veteran who often chronicled the detective's cases from his perspective.
sherlock holmes
Watson.
Holmes and Watson follow the other two to their hotel.
Sherlock Holmes views Dr. Watson as a valued companion and trusted confidant in solving cases. Despite his occasional teasing, Holmes respects Watson's loyalty, intelligence, and dedication to their work together. Their partnership is characterized by mutual respect and a deep bond of friendship.