Occupancy by John A. Macdonald, 1848–49

Much of what is known about the stay of Sir John A. Macdonald and his family at Bellevue has been gleaned from both general historical knowledge of the 19th century in Kingston and from five letters that Macdonald himself wrote while living at Bellevue. The Macdonalds rented Bellevue from Charles Hales in the hope that the fresh air of what were then the outer suburbs of Kingston would assist in Isabella's recovery. The experiment was a failure, and Isabella did not recover from her chronic malady. In addition to this burden, tragedy further struck the young family when their first-born son, John Alexander Jr., died in the house a month after his first birthday.

As a lawyer and a member of the Legislative Assembly of the Province of Canada, Macdonald was often absent from Bellevue House, visiting his second law office in Toronto or attending parliamentary sessions in Montreal. Isabella's health continued to fluctuate during this time.^[6] Despite her frail condition, however, Macdonald reports in his letters that she kept a watchful eye on the servants and the day-to-day affairs of the house.

While entertaining was expected of prominent lawyers and politicians like Macdonald in the 19th century, Isabella's frail condition prevented her from fulfilling this part of her responsibility as a politician's wife. For this reason, the drawing room and the back parlour would likely not have been used while the Macdonald family stayed at Bellevue House. The only guest that is known to have stayed at Bellevue House between 1848 and 1849 while the Macdonalds lived at the villa was Lt. Col. John Clark, an officer in the British military who was Isabella's brother and a trusted member of the family.

Given the expenses associated with renting Bellevue and the fact that Isabella continued to suffer from chronic illness, the Macdonald family moved from Bellevue House in 1849 to another house in Kingston.^[7] At the time of the move, Isabella was pregnant with their second child, Hugh John Macdonald.^[8]

Family home and restoration, 1849–1967

Bellevue circa 1891

Bellevue House continued to be inhabited by middle-class Kingston families until it was purchased by Parks Canada in 1964 with the intention of commemorating Sir John A. Macdonald.^[9] Significant renovations had been performed in the intervening century, including the addition of electricity, indoor plumbing, and central heating, as well as changes to the floor plan. Parks Canada historians and archaeologists did significant research to determine how the home would have appeared in the late 1840s, and it was restored both indoors and outdoors to its original colours and wallpaper patterns. Furnishings from the 1820s–1840s were purchased from antique dealers in Kingston and surrounding areas to lend as much authenticity as possible to the site. The site also received a few items that would have belonged to Macdonald in the late 1840s, including a portion of his library. Bellevue House opened as a "national historic park" in 1967, to coincide with the centennial of Canadian Confederation.^[10]