It isn't a good idea to have your email address on a public post. Best to send that sort of information by a personal message.
This is what I have from the Records Office in Kendal. It is well worth a visit if you have time. I hope it is helpful and that you can decipher my method of note taking. Yewbarrow Hall and Kilnstones are both still there, so if you find you have a link to this family, you can have a look at them as well when you come up.
Kellett Family:
i) John Kellet, born circa 1700. John’s wife was Mary ( surname unknown). They had at least three children, John (circa1723, Selside), Thomas and William ( dates unknown). No more details known about John or his family.
ii) John Kellet, born circa 1723, Selside. John married Abigail Todhunter on 16th December 1755, in Longsleddale. Their offspring included:- William ( Circa 1760 Longsleddale), Thomas ( bapt 1760, Longsleddale), David ( 1768, Longsleddale) and Joseph ( 1762, Longsleddale)
iii) William Kellet circa 1760, Longsleddale. William married Ann Wilson ( no details known about her parents), on 20th February, 1792, in Longsleddale. From 1829 to 1841 he can be found at Yewbarrow, or Ubarrow, Hall in Longsleddale, where he was a farmer. William and Ann had nine children:- Abigail (1793, LS) Thomas (1794, LS), Isabella ( 1796, LS), Ann ( 1797, LS), John (1799, LS), Richard (1801, LS), Elizabeth ( 1802, LS), Agnes,( 30/8/1806, Longsleddale) and Frances (1811, LS). William died in 1843 and was buried in Longsleddale on 2nd July 1843. His wife, Ann, was still at Yewbarrow Hall in 1851, where she was described as a farmer of 314 acres. She died at Yewbarrow Hall in 1861.
Agnes Kellet, 1806, Longsleddale: She spent most of her life at either Kilnstones or Yewbarrow Hall, Longsleddale. The only census on which she was somewhere else was 1891 when she was at Bark Booth, Crosthwaite. She married Thomas Kitchen on 11th November 1828 and died in October 1894.