'Looking for info on family of William Nicholson ..... would be grateful for any info'

On later Census, William c 1806 and his sister Sarah c 1802

1881 Census, Newland

William NICHOLSON - 75 - Retired Baptist Miner, born Devon, Plymouth Dock
Mary C NICHOLSON -67 - Derbyshire, Fairfield, Buxton
Sarah NICHOLSON, Sister, unmarried age 78, born Devon, Plymouth Dock

IGI Batch Numbers for Devon,

Liberty Street - Now Pembroke Street - Baptist, Plymouth DOCK (various NICHOLSON christenings) including children of

William & Sarah NICHOLSON

Sarah - 12 June 1802
Joseph - 9 November 1803
William - 14 August 1805

This family is well documented on Ancestry Public Member Family Tree - going back to John NICHOLSON, 1670 Port au Pugh, Scotland