a small advance from her father-in-law enabled her to lodge nearby. Sir Timothy Shelley had at first agreed to support his grandson, Percy Florence, only if he were handed over to an appointed guardian. Mary Shelley rejected this idea instantly. She managed instead to wring out of Sir Timothy a limited annual allowance (which she had to repay when Percy Florence inherited the estate), but to the end of his days, he refused to meet her in person and dealt with her only through lawyers. Mary Shelley busied herself with editing her husband's poems, among other literary endeavours, but concern for her son restricted her options. Sir Timothy threatened to stop the allowance if any biography of the poet were published. In 1826, Percy Florence became the legal heir of the Shelley estate after the death of his half-brother Charles Shelley, his father's son by Harriet Shelley. Sir Timothy raised Mary's allowance from £100 a year to £250 but remained as difficult as ever. Mary Shelley enjoyed the stimulating society of William Godwin's circle, but poverty prevented her from socialising as she wished. She also felt ostracised by those who, like Sir Timothy, still disapproved of her relationship with Percy Bysshe Shelley. In the summer of 1824, Mary Shelley moved to Kentish Town in north London to be near Jane Williams. She may have been, in the words of her biographer Muriel Spark, "a little in love" with Jane. Jane later disillusioned her by gossiping that Percy had preferred her to Mary, owing to Mary's inadequacy as a wife. At around this time, Mary Shelley was working on her novel, The Last Man (1826); and she assisted a series of friends who were writing memoirs of Byron and Percy Shelley—the beginnings of her attempts to immortalise her husband. She also met the American actor John Howard Payne and the American writer Washington Irving, who intrigued her. Payne fell in love with her and in 1826 asked her to marry him. She refused, saying that after being married to one genius, she could only marry another. Payne accepted the rejection and tried without success to talk his friend Irving into proposing himself. Mary Shelley was aware of Payne's plan, but how seriously she took it is unclear. In 1827, Mary Shelley was party to a scheme that enabled her friend Isabel Robinson and Isabel's lover, Mary Diana Dods, who wrote under