Nos. 24–29: Mathematical Institute
The University of Oxford Mathematical Institute, shown above, was built in the mid-1960s. It replaced the six old houses numbered 24–29 St Giles Street.
The old No. 24 (the Windmill Inn) and Nos. 25 and 26 had been demolished in the early 1860s and rebuilt as much larger four-storey houses with extra accommodation in the roof: they were all used as university boarding houses at some point, and the Marlborough Secretarial College began life at No. 24.
No. 26 was known as Balliol Hall, and in 1875 the Dragon School started life in two rooms here, moving to Banbury Road in 1879.
Left The six houses demolished to make way for the Mathematical Institute can be seen in the centre of this photograph (taken in about 1920). They are sandwiched between two existing buildings, namely Nos. 22/23 (in the right foreground with its three gables) and No. 30 (on the left by Keble Road with its two gables) .
Nos. 24, 25, and 26 comprised the very large building set back from the road. The much lower shop beyond this is No. 27, while the three-storey building to the north again comprised Nos. 28 and 29.
| No. 24 | No. 25 | No. 26 | |
| 1841––52 | Windmill Inn (Henry Hutt) |
Robert Adams Butcher |
William Tarrant Shoemaker |
| 1861 | James Walton Whitesmith |
Richard Carter Carpenter |
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| Rebuilt in early 1860s | |||
| 1866 | Mrs Morrison | James West | Rev. T. Arnold, M.A. |
| 1867 | H.B. Spencer, M.D. | ||
| 1869 | Mrs Maskell | Balliol Hall: T.H. Green, M.A. (1869–76) Frederick William Jenkins (1880–4) Mrs F.W. Jenkins (1887–1908) |
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| 1871––5 | Rev. Joseph S. Treacher Vicar of St John the Baptist |
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| 1876 | S.W. Taylor | ||
| 1880–4 | Misses Fruin (1880–95) Miss Mary Fruin Lodging house 1896–89 |
Brentford House: Walter Green Faulks University Lodgings (Mrs Faulks 1894) |
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| 1895–9 | Lodging House Mrs Phoebe Mobey (1895–1913) Miss E.M. Faulks (1913–41) |
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| 1900–8 | William Simmonds & Co. Coal merchants |
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| 1909–18 | Albert Charles Rolls Mrs Rolls University Lodging House |
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| 1919 | Alexander John Cameron | ||
| 1921–3 | Mrs Massey | ||
| 1925–7 | Miss Mullett | ||
| 1928 | Mrs (Kil)kelly Patrick P. Kilkelly Ophthalmic surgeon |
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| 1932 | Mrs A. Smith Boarding house |
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| 1934–7 | Mrs Blanchard — Miss J. Dunkley Masseuse |
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| 1939 | Arthur H. Hickling | ||
| 1941 | Marlborough Secretarial Training School Miss D. Hickling, Principal |
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| 1945 | Miss E. A. Coombs | ||
| 1947 | Miss D. Hickling | Alexander B.F. Gibson Physician & surgeon |
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| 1949–54 | |||
| 1956 | Boris Weber | No listing | |
| 1958–60 | Frederick Halcrow | Randolph Hotel Staff Residence |
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| 1962 | — | ||
| 1964 | Adrian Davies | ||
| Demolished to make way for Mathematical Institute | |||
The low building in the middle (No. 27) was for many years a shop:
| No. 27 | No. 28 | No. 29 | |
| 1841 | Joseph Carter Coal merchant (non-resident) |
George Parrott Farmer & dairyman of 73 acres employing 8 labourers |
Esther Masham Shopkeeper |
| 1846 | — | ||
| 1852 | Thomas
Grimsley Sculptor and patent roof & terracotta manufacturer |
Henry
Emerton Railway clerk Academy taking boarders: Mrs Julia Emerton |
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| 1861 | Henry Jacob Clerk to Justices |
Charles Richards Auctioneer Mrs Ann Richards from 1880 |
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| 1866–9 | William Morley Bookbinder |
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| 1871 | Frederick Grimbley | ||
| 1872 | Benjamin Hart Builder (employing 200 hands) Mrs Hart Milliner |
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| 1880–4 | Mrs Martin Robert Martin Cabinet maker |
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| 1887–1904 | Thomas Howard | ||
| 1906–8 | Percy Halfacree Bootmaker |
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| 1910 | William John
Potter Printer The Potter Press |
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| 1911 | Ernest Henry
Brownjohn Bootmaker |
— | |
| 1912–14 | Henry J. Potter | ||
| 1915–16 | Edward Dowse Bootmaker |
Herbert James
Potter (Miss Joan Potter from 1949) — Miss Frances A. Marzials |
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| 1918 | Miss Dorothy
Humphrey Dairy |
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| 1919–23 | Colin Harse Cycle agent |
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| 1925–6 | Madame Derwent Draper |
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| 1927 | Campbell & Garrick Dyers |
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| 1929–39 | Mrs M.A. Dorrill Shopkeeper Colin Harse |
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| 1941–5 | A.J. Luce Shopkeeper Mrs Harse |
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| 1947 | Levy &
Freeman Sign writers |
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| 1949–58 | Swift School of Motoring | ||
| 1960 | William Holmes, M.A., D.Phil. | David Longrigg | |
| 1962 | — | ||
| 1964 | — | Leonardo Castillejo, M.A. | |
| Demolished to make way for Mathematical Institute | |||
Windmill Yard was between the Windmill at No. 24 and No. 25, and Adams Yard (presumably named after Robert Adams the butcher at No. 25, and probably the former Boot Alley) was between Nos. 25 and 26.