The quotations from letters above are taken from J.C. Hadden's article "Some Friends of Browning" in Macmillan's Magazine, Jan. 1898.
Later in life Browning came to think unfavourably of Shelley as a man and to esteem him less highly as a poet. He wrote in December 1885 to Dr Furnivall: "For myself I painfully contrast my notions of Shelley the man and Shelley, well, even the poet, with what they were sixty years ago." He declined Dr Furnivall's invitation to him to accept the presidency of "The Shelley Society."
Even the publishers—Saunders and Otley—did not know the author's name.—"Letters of R.B. and E.B.B.," i. 403.
"V.A. xx," following the quotation from Cornelius Agrippa means "Vixi annos xx," i.e. "the imaginary subject of the poem was of that age."—Browning to Mr T.J. Wise.
Edmund Gosse: "Robert Browning Personalia," pp. 31, 32. Mr W. M. Rossetti in "D.G. Rossetti, his Family Letters," i. 115, gives the summer of 1850 as the date of his brother's letter; and says, no doubt correctly, that Browning was in Venice at the time. Mr Sharp prints a letter of Browning's on his early acquaintance with Rossetti, and on the incident recorded above. I may here note that "Richmond," appended, with a date, to Pauline, was a fancy or a blind; Browning never resided at Richmond.