He was the only child of Thomas Ashby, and his wife, Rose Emma, daughter of Apsley Smith. His father belonged to the well-known Quaker family to whom belonged Ashby's brewery at Staines – this became a private company in 1886.
Appearance and manner
Stocky in figure, he had a tall and forceful head and a neat beard. His English and Italian were both equally brusque, and the Oxford Dictionary of National Biography calls him "shy with strangers, blunt with acquaintances, and devoted to his friends".
Life
Early life
An exhibitioner at Winchester College, Thomas there gained the lasting nickname Titus. Ashby won a scholarship at Christ Church, Oxford, studying under Francis John Haverfield and John Linton Myres, then gained a first in Classical Moderations and in literae humaniores. Concentrating on Roman antiquities after 1897, he next published his first article, gained an Oxford degree of DLitt and won the Conington Prize for classical learning. Understanding of the city of Rome was then being transformed by a series of excavations, including renewed work on the Roman forum, and Ashby wrote a regular series of reports on these developments for the Classical Review, The Times, the Times Literary Supplement, and the Antiquaries Journal.
Ashby enrolled in January 1902 as the first student of the British School at Rome, under its first director Gordon McNeil Rushforth, and was the same year appointed its honorary librarian and elected as a fellow of the Society of Antiquaries. Rushforth and his successor Henry Stuart Jones both retired early due to ill health and Ashby became the School's third director, until 1925. His first assistant directors were Augustus Moore Daniel, then from 1909 Eugénie Strong – the latter appointment made Ashby's position at the school more secure and extending the School's influence in Roman society, with Eugénie in effect serving as its hostess. Trying to make the British School at Rome a focus for archaeological research in the western Mediterranean, Ashby appointed as associate student of the BSR Duncan Mackenzie, who had just worked with Arthur Evans at Knossos. Ashby and Mackenzie presented a joint paper on the ethnology of Sardinia to the British Association for the Advancement of Science meeting in York in summer 1906. This research area at the BSR dried up in 1909 when Mackenzie returned to work for the Palestine Exploration Fund in the eastern Mediterranean, though Ashby did make a return trip to Sardinia in 1912. Turning his attention to the British islands of Malta and Gozo and their possibilities for research on Mediterranean prehistory, and joined by T. Eric Peet for the 1905–6 session, Ashby visited Malta alone on various occasions in 1908 and 1909 and returned with Peet to excavate the sites of Hagiar-Kim and Mnaidra in 1910 and 1911.
With the support of the British ambassador Sir Rennell Rodd, the BSR decided in 1912 to relocate a new, larger, permanent building in the Valle Giulia, designed by Lutyens, and to expand into not only archaeology but also art and architecture. The move itself occurred in 1915 saw the actual move, and Ashby's volunteering not to fight in the First World War but instead to serve as a translator in the first British Red Cross ambulance unit, based at the Villa Trento near Udine, leaving Mrs Strong to run the School. Ashby felt this appropriate to his Quaker leanings and, though it drew criticism, he was still asked to return to Rome and the BSR, and was mentioned in dispatches for his bravery in his ambulance work on the Asiago plateau. Moving to the British Red Cross headquarters in Genoa from late 1917 to spring 1918 after the Italian defeat at the battle of Caporetto, Ashby then moved to Rome as an education officer, and only resumed his role as director of the school in spring 1919. On his return, he and Strong had immediately to restart the school's work on the sculpture catalogue which Stuart Jones had begun, though Ashby still managed to return to Malta in March 1921 to work with Themistocles Zammit at Hal-Tarxien and to continue his interest in prehistory by collaborating with Peet and H. Thurlow Leeds on an essay on the western Mediterranean for the Cambridge Ancient History. On his return from Malta in spring 1921, Ashby met Caroline May, eldest daughter of the civil engineer Richard Price-Williams and cousin of Walter Ashburner, working in the school library. The couple married on 20 July 1921 and, though they had no children, Caroline began to take over Strong's role as hostess at the school, straining relations between them. In 1924 the BSR executive committee decided to only renew Strong's and Ashby's appointments until 1925, when Mrs Strong would reach retirement age at sixty-five. General shock greeted the decision, with Rennell Rodd writing in late November 1924:
Retirement and death
Ashby settled in Rome after his enforced retirement and set to work completing "Some Italian scenes and festivals", a revision of the second part of W. J. Anderson and R. P. Spiers's 1902 "The architecture of Greece and Rome", and a revised edition of Samuel B. Platner's "Topographical dictionary of ancient Rome". He also carried out lecture tours of Australia and – in 1926 – he embarked of North America. Ashby's health seems to have declined in this period, including deteriorating eyesight. Elected in 1930 to a senior research studentship at Christ Church, Oxford, he returned to England to fulfil the post's residence requirements. However, on his way to Oxford on the morning of 15 May 1931, he fell from the Southampton to Waterloo train between New Malden and Raynes Park, Surrey. An enlarged brain tumour was revealed in the post-mortem. Despite suspicions of suicide, an open verdict was recorded. Ashby was cremated, with his ashes interred at St Margaret's Bay in Kent.
Studies
Topography
Excavation in Italy, in the post-Risorgimento period of the 1910s, was limited to Italians and disallowed to foreigners, leading to their concentration on topographical and museum studies. Ashby was no exception, producing a series of detailed topographical studies of Italy's Roman roads, later collated in the valuable work The Roman Campagna in classical times, and studies on the aqueducts in the city of Rome, the first of which was published in the Classical Review in 1900. . Indeed, Ashby grew into a master of Rome's urban topography, working from both classical and early modern literature and prints, and drawing on Antonio Labacco's 16th century architectural drawings, Eufrosino della Volpaia's 1547 map of the Campagna, the Étienne du Pérac's 1581 topographical studies, Giovanni Battista de'Cavalieri's "Antiquae statuae urbis Romae", and the art collections at Windsor Castle, the Sir John Soane Museum, and Eton College.
Haverfield also encouraged and supported Ashby in gaining excavation experience at the Roman town of Caerwent in south Wales as part of the Caerwent Exploration Fund, presided over by Lord Tredegar and initiated by the Clifton Antiquarian Club. Ashby, Alfred E. Hudd and A. Trice Martin, an assistant master at Clifton College, all worked on the project, with Ashby contributing to the annual reports published in Archaeologia.