While in living in Paris Longueville Jones appears to have returned to England fairly frequently. In particular he read five papers to the
Manchester Statistical Society, who were keen to promote a
University College in Manchester that would be part of the University of London. He published this initially in 1836 as "Plan of a University for the town of Manchester". The suggestion was not acted upon, but on Jones's return from France he started a college of his own in Manchester; this, however, met with little success, and was shortly afterwards abandoned, though it prepared the way for the establishment of
Owen's College in 1851. By 1845 Longueville-Jones had moved to
Beaumaris and imbued with the ideas of
Prosper Mérimée he had started his survey of the antiquities of the
Isle of Anglesey. Initially, he was to contribute three papers too the newly formed British Archaeological Association (later
Royal Archaeological Institute). These were entitled
"Medieval Antiquites of Anglesey";
"Remarks on some of the churches of Anglesey" and on the
"Cromlechs". He was also to submit two papers on the
"Medieval Ecclesiastical Architecture of Paris", based on his work in revising Galignani's Paris Guide. Longueville Jones had hoped that the British Archaeological Association would form a separate Welsh section, but the Association was not agreeable to this. It was also in this period that he became involved in the successful campaign, led between 1843 and 1847 by the scholarly
Edward Herbert, 2nd Earl of Powis Earl of Powis, to a proposal to unite the sees of
Bishop of Bangor and
St Asaph. This was intended to provide funding for a new
Diocese of Manchester. It was in the course of this campaign that Longueville Jones met the
Rev. John Williams (Ab Ithel) and realising their kindred interests in Welsh history, literature and antiquity, led to their production, in January 1846, of the first number of the periodical which they entitled
Archaeologia Cambrensis. The publication led to the expression of a desire for the establishment of an association to study Welsh archaeology. Longueville-Jones accordingly organised a meeting at Aberystwith in September 1847, and the Cambrian Archæological Association was then founded. He resigned as editor in 1849 on his appointment as Inspector for National Schools in Wales. Jones resumed as editor of "Archaeologia Cambrensis" in 1855 and continued until his death in 1875. It contains many articles by him, and many engravings of his drawings, particularly of cromlechs, inscribed stones and churches. ==Appointment as Inspector for National Schools in Wales==