In 1788, 1789, 1790, 1791, 1792, 1793, 1794, and 1795 William lived in Oxford Street (Parish of Piccadilly). There is no entry for him in 1796. In 1797 he lived in Argyll Street , and in 1798, 1799, 1800, 1801, 1802, 1803 was again in Oxford Street (Argyll Street leads off Oxford Street, so this could be the same dwelling). In 1798 William is noted as the Master of an Apprentice, Edward H. Gamlick, and his profession is described as Apothecary.
William and Catherine had at least nine children, all baptised in Westminster. The first, Catherine, died aged three, and her brother William died in infancy. It is not currently known when the next child, a second William died. Hildebrand died aged one. Hildebrand-Barry lived for 94 years. The second Catherine lived only for one year. Henry and Charles Wyndham (senior) survived to adulthood. Their last child, a third Catherine also died as an infant.
William was buried at St. Dionis Backchurch, London on 11 September 1834.
William was baptized in the Church of Saint Clement Colegate, Norwich, Norfolk, England on 12 Sep 1756. His parents were listed as William and Eliz. Barnham. The church stands at the point where medieval and modern Norwich meet; to the south are Pye Bridge, Tombland and the cathedral precincts, while to the north is busy Magdalene street. Westwards stretches Colegate, leading into Coslany, the medieval Norwich-over-the-Water, the industrial heart of the city in the 18th and 19th centuries.
Saint Clement was probably the first of the city churches on the north side of the river, and has lived through the changes that a thousand years have brought. The present church is almost entirely the work of the 15th century, although the chancel is slightly earlier.
The font is an early 16th century one, with that proto-renaissance styling that makes us wonder how artistic endeavour might have flowered if the Reformation had not intervened. There is also a 1516 figure brass to Margaret Petwood in the middle of the nave, and these two features may indicate the date at which the church was finished. Apart from that, the interior is largely Victorian in character. There are 18th and 19th century memorials around the walls to the Ives and Harvey families, who supplied a number of mayors of Norwich.
William was a surgeon in Uxbridge, a university town in the London Borough of Hillingdon in West London.