Who was Margaret Montgomerie in James Boswell’s life?

Margaret Montgomerie was the first cousin of the Scottish biographer James Boswell, whom he married in November 1769.1

Following their marriage, the couple had five children together. While Boswell was initially happy and faithful during the early years of their union, his later life was marked by personal struggles, including heavy drinking and infidelity. Margaret suffered from tuberculosis, and by 1778, it was clear that she was critically ill.1