Robert did not come from that important branch of the Lewknor family with large estates in Sussex and Middlesex to which belonged Roger Lewknor, the shire knight of 1335-51, and Sir Thomas Lewknor, the MP of 1422 and 1425, although he was distantly related to them both.
The first recorded incident of Lewknor’s career sets the tone for his future behaviour. In 1367, as ‘of Harrowden’, he failed to appear in court to answer the suit of the parson of Ardingley (Sussex) for a debt of 45 marks, and ended up in the Fleet prison. It was his father, however, who began the dispersal of their landed resources with the sale of property at Thame and Lewknor and, more important, of the principal properties at Harrowden, although when he died in about 1381 at least six other manors were still in his possession.
Lewknor had also been less than fortunate in his marriage, to the daughter of a London clothier, for it brought him little material advantage. His father-in-law, in the will he made in 1373, had left him a single silver cup and to his wife a few household goods together with the sum of ten marks; the property in the City which Lewknor may have hoped to acquire was all designated for the recently founded Charterhouse. No assessments for the value of Lewknor’s Oxfordshire holdings have survived, although those in Northamptonshire at Greatworth were estimated at 20 marks a year in 1412, when he was also holding lands at Pulborough in Sussex worth £20 annually.
Lewknor’s financial position deteriorated steadily in the last years of his life. A clerk from Essex had sued him for debt in 1403; then in 1408 the sheriff of Sussex was ordered to arrest him for failing to honour a bond for £20 entered into nearly 20 years previously. Neither the sheriff nor the earl of Arundel’s bailiff were able to track him down, but nevertheless seized his lands in Rudgwick and Pulborough to satisfy his creditors. Four years later, Lewknor began the process of selling certain of his Oxfordshire manors to Thomas Walwyn II of Herefordshire, a retainer of the earl’s sister, Joan, Lady Beauchamp of Abergavenny. In a deed dated at Harvington in Worcestershire in 1412 he referred to his son, Thomas, whose seal he was then using, but nothing is heard of either father or son after May 1415.
