Question: Who was the architect of the hall built on the site of an August 1819 English massacre?

Context paragraphs:
Grodków Town Hall: Grodków Town Hall - a town hall built in the Classical architectural style in 1840, designed by architect Philippi, using the tower of the former town hall.  Currently, the building is the seat of the Grodków City Council and other institutions.

Price Memorial Hall: Price Memorial Hall, also known as the Price Memorial Building, is a historic site in Dahlonega, Georgia.  The hall was built on the site of the U.S. government's federal branch mint built in 1836.  It burned down in 1878 and the university, one of the first Federal Land Grant Colleges, had its hall built on the foundation.  A historical marker is located on the site.

The Cenci: The Cenci, A Tragedy, in Five Acts (1819) is a verse drama in five acts by Percy Bysshe Shelley written in the summer of 1819, and inspired by a real Italian family, the House of Cenci (in particular, Beatrice Cenci, pronounced CHEN-chee).  Shelley composed the play at Rome and at Villa Valsovano near Livorno, from May to 5 August 1819.  The work was published by Charles and James Ollier, in London in 1819 (see 1819), the Livorno edition, printed in Livorno, Italy by Shelley himself in a run of 250 copies.  Shelley told Thomas Love Peacock that he arranged for the printing himself because in Italy "it costs, with all duties and freightage, about half of what it would cost in London."  Shelley sought to have the play staged, describing it as "totally different from anything you might conjecture that I should write; of a more popular kind ... written for the multitude."  Shelley wrote to his publisher Charles Ollier that he was confident that the play "will succeed as a publication."  A second edition appeared in 1821, his only published work to go into a second edition during his lifetime.

1819 English cricket season: In the 1819 English cricket season, the Gentlemen v Players match, previously played in 1806 only, was resurrected.

Charles Morton (impresario): Charles Morton (15 August 1819–18 October 1904) was a Music hall and theatre manager.  Born in Hackney, he built the first purpose built "tavern Music hall", the Canterbury Music Hall, and became known as the "Father of the Halls".

Ode to the West Wind: "Ode to the West Wind" is an ode, written by Percy Bysshe Shelley in 1819 near Florence, Italy.  It was originally published in 1820 by Charles and Edmund Ollier in London as part of the collection "Prometheus Unbound, A Lyrical Drama in Four Acts, With Other Poems".  Some have interpreted the poem as the speaker lamenting his inability to directly help those in England owing to his being in Italy.  At the same time, the poem expresses the hope that its words will inspire and influence those who read or hear it.  Perhaps more than anything else, Shelley wanted his message of reform and revolution spread, and the wind becomes the trope for spreading the word of change through the poet-prophet figure.  Some also believe that the poem was written in response to the loss of his son, William (born to Mary Shelley) in 1819.  The ensuing pain influenced Shelley.  The poem allegorises the role of the poet as the voice of change and revolution.  At the time of composing this poem, Shelley without doubt had the Peterloo Massacre of August 1819 in mind.  His other poems written at the same time—"The Masque of Anarchy", "Prometheus Unbound", and "England in 1819"—take up these same themes of political change, revolution, and role of the poet.

Bai Pirojbai Edulji Chenai Parsi Dharamshala: Bai Pirojbai Edulji Chenai Parsi Dharamshala is a Parsi Dharamshala (communal shelter) which is located at Secunderabad, India.  It was established in 1889, the property donated, belonged to Chenai for the use of Zoroastrians coming to Hyderabad.  The Dharamshala has a large hall built in 1893, and another small hall built in 1919 known as Jamshed S. Chennai Hall.  It also has a pavilion known as Edulji S. Chenai Pavilion built in 1929.  It is located on Mahathma Gandhi Road.

Brighton Town Hall, Adelaide: Brighton Town Hall, Hove, is located on Brighton Road, Hove, in the city of Adelaide in South Australia.  The Brighton Town Hall was built in 1869 and was just the fourth Town Hall built in the colony of South Australia.  The architect and builder was George William Highet who arrived in the colony in 1836.  G. W. Highet served as a town clerk and Councillor and died in Brighton aged 80 years.  The hall was constructed of stone from Ayliffe’s quarry in the Adelaide Hills laid on concrete foundations.  The pioneers built it not just as a place for the business of Government but as a place "to serve the wants of the citizens" for many different activities.  On 10 May 1869 a foundation stone was laid by the Hon John Hodgkiss a member of the Legislative Council of South Australia in a ceremony attended by many of South Australia's most important pioneers.  Under this stone was placed a time capsule containing copies of the newspapers of the day.

Free Trade Hall: The Free Trade Hall in Peter Street, Manchester, England, was a public hall constructed in 1853–56 on St Peter's Fields, the site of the Peterloo Massacre and is now a Radisson hotel.  The hall was built to commemorate the repeal of the Corn Laws in 1846.  The architect was Edward Walters.  The hall was owned by the Manchester Corporation.  It was bombed in the Manchester Blitz and its interior rebuilt.  It was Manchester's premier concert venue until the construction of the Bridgewater Hall in 1996.  The hall was designated a Grade II* listed building on 18 December 1963.

Peterloo Massacre: The Peterloo Massacre occurred at St Peter's Field, Manchester, England, on 16 August 1819, when cavalry charged into a crowd of 60,000–80,000 who had gathered to demand the reform of parliamentary representation.

Supporting paragraphs: Free Trade Hall Peterloo Massacre
Answer: Edward Walters