[2] In February 1668 he was finally admitted to the freedom in a compromise arrangement in which he was officially recorded as being employed by Trinity College, Oxford as a gardener and paid a fine of 20 nobles (£6.13s.4d.)
[3] In 1669 Wadham College, Oxford had a new turret clock built and from 1671 to 1721 Knibb's younger brother John was paid £1 per year to maintain it.
Clock cases of Knibb's era were wooden, and therefore were made by specialist clockcase makers who were members of the Worshipful Company of Joiners and Ceilers.
[8] The politician Richard Legh (1635–87) wrote to his wife describing Knibb's advice on choosing a case for a longcase clock: I went to the famous Pendulum maker Knibb, and have agreed for one, he having none ready but a dull stager which was at £19; for £5 more I have agreed for one finer than my Father's, and it is to be better furnished with carved capitalls gold, and gold pedestalls with figures of boys and cherubimes[9] all brass gilt.
[10]Legh's young wife, Elizabeth, replied in agreement: "My dearest Soule; as for the Pandolome Case I think Blacke suits anything".
A younger cousin Peter Knibb (1651–79) from Farnborough, Warwickshire was apprenticed to Joseph in 1668[3] and became a freeman of the Worshipful Company of Clockmakers in 1677.
[14] On 6 November 2012 Sotheby's sold a small Roman striking table clock by Knibb from the George Daniels collection for £1,273,250.