Before moving on the the 20th-century provenance of the manuscript(s) discussed in the previous post, I need to add an important piece of the 19th-century provenance that I failed to include last week.
Howel Wills (1854-1901) was a collector in whom I've had an interest since the 1990s, when I catalogued some of his manuscripts now at the Bodleian. On my old provenance webpages, made in the early 2000s, I posted some basic biographical information and some images to show how his books can be recognised. More recently, I have occasionally had the chance to mention him in blogposts, such as here. 
It turns out that he was the owner of the 1465 manuscript (when it was still bound as a single volume) and it was included in his sale at Sotheby's, 11 July 1894, lot 1194:
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"Leighton (London bookseller), no. 789 in an undated catalogue; Sotheby's, London, December 19, 1955, lot 57 and December 11, 1961, lot 170; bought by Curt H. Reisinger from Davis & Orioli, London (cat. 166, 1962, no. 43) and presented [to the Houghton Library] in 1962"
- Both parts written for a member of the Maffei family, in Rome, in 1475, and thence by descent though his heirs including Mario Maffei (d.1600) , reaching England by the 18th century, when owned -- with many other Maffei manuscripts -- by:
- Anthony Askew (1722-74); sold at Sotheby's, 7 March 1785, lot 486, bought by:
- Michael Wodhull (1740-1816); sold by his heirs many years after his death at Sotheby's, 11 January 1886, lot 1646, probably bought at the sale by:
- Howel Wills (1854-1901); sold at Sotheby's, 11 July 1894, lot 1194, bought by Quaritch, and presumably sold by them to:
- Henry White (1822-1900); sold at Sotheby's, 21 April 1902, lot 1406, bought by:
- Leighton, who divided it into two volumes:
- Still with Leighton in 1905, but later owned by:
- Henry Harvey Frost (1873-1969), industrialist and bibliophile, who sold it in 1952 to:
- The V&A Museum
- Tamaro de Marinis, 1911
- Leighton, offered in an undated catalogue (between 1922 and 1928), as no. 789
- "The Property of a Lady"; sold at Sotheby's, London, December 19, 1955, lot 57, bought by:
- "The Property of a Lady"; sold at December 11, 1961, lot 170; bought by:
- Davis & Orioli; offered in their Cat. 166 (1962), no. 43; bought by:
- Curt H. Reisinger; presented by him the same year to:
- The Houghton Library
"Howel Wills was born in Shanghai in 1854, a British subject, the only son of Charles Wills (1816–57, born in Devon) and Nellie Wills (born c. 1820, of Chinese descent). He came to Britain as a child and was educated at Clifton College, Bristol, then at Corpus Christi College (1873–75) and Balliol College (1875–77), Oxford, graduating in Classical Moderations (2nd class, 1875) and Literae Humaniores (3rd class, 1877).
Wills then embarked upon a legal career. He was admitted as a Member of the Inner Temple in 1875, aged 21, and was called to the bar in 1882. He was on the Western Circuit in 1883 (equity, draughtsman, conveyancer), and his address for the years 1884–95 was 1 King’s Bench, Temple. The name of Howel Wills remained in the Law List until 1901, the year of his death, but with no address after 1896.
Howel Wills died in Verona on 7 December 1901, unmarried and without issue. He is best known for his interest in antiquarian books, fine art and other antiquities. Indeed, in February 1894 Christie, Manson and Woods arranged three sales of collections belonging to Mr Howel Wills, of Florence: ‘collection of engravings, etchings, drawings by and after old and modern masters’ (13–14 February); ‘collection of antiquities and objects of art’ (15–16 February); ‘collection of pictures by old masters’ (17 February). In July that year, ‘the great sale of the library of Mr Howel Wills, of Florence … the principal book sale of the season’ took place at Sotheby, Wilkinson & Hodge, 11–17 July 1894, realizing a total of £8,204 11s."
 Information about the Leightons as bookbinders can be found here. I plan to do a blogpost on the catalogues of the bookselling side of the company, many of which are undated.
 The V&A volume has an erased inscription in the upper margin of fol. 1r, typical of MSS from the Maffei family; it probably read 'De figliuoli et heredi di M(esser) Mario Maffei' ie Mario Maffei junior, who died in c.1600, the son of the adopted son of Mario Maffei (1463-1537).