1. (Research):185/59 are possibly the same William Blacknell; [Note Record]
2. (Medical):Phthisis - 1. a wasting away; 2. pulmonary tuberculosis; consumption - http://dictionary.reference.com/browse/Phthisis; [Note Record]
3. (Research):Calverton parish burial record for Frederic Blacknell 16-Jun-1853. Could this be the same child. His future brother William also died very young.; [Note Record]
4. (Medical):Hydrothorax - the presence of serous [of watery nature] fluid in one or both pleural [lung lining] cavities - https://www.dictionary.com/browse/hydrothorax; [Note Record]
i. "Marriage register for the parish of Calverton in Nottinghamshire covering 1837-1900," transciption database, Society of Genealogists; Page accessed 13 Jan 2020), Entry for William Blacknell & Harriett Worthington.; [Source Record]; Certainty Primary Evidence
ii. Public Record Office, "Census Returns of England and Wales, 1861"; Page PRO RG9/2444 f12 p14; [Source Record]; Certainty Primary Evidence
iii. Public Record Office, "Census Returns of England and Wales, 1871"; Page RG10 3494 p18; [Source Record]; Certainty Primary Evidence
iv. England and Wales, birth/marriage/death certificate; General Register Office, Southport.; Page Death/1873/Basford/Arnold/223; Text 223 Twenty fifth February 1873 Calverton William Blacknell Male 44 Years Stocking Framework Knitter Chronic Phthisis 3 Years Certified The mark of Richard Blacknell in attendance Calverton Twenty seventh February 1873 J Phipps Registrar; [Source Record]; Certainty Unknown ('4')
v. "Census Returns of England and Wales, 1851." online database.; Page (accessed 13 Jan 2020), entry for Richard Blacknell 181, Calverton; [Source Record]; Certainty Primary Evidence
vi. "Christening register for the parish of Calverton in Nottinghamshire covering 1744-1901," transciption database, Society of Genealogists; Page accessed 3 Jun 2011), Baptism Frederick Blacknell.; [Source Record]; Certainty Secondary Evidence
vii. England and Wales, birth/marriage/death certificate; General Register Office, Southport.; Page Death/Basford/Arnold/1855/199; [Source Record]; Certainty Unknown ('4')
viii. "Christening register for the parish of Calverton in Nottinghamshire covering 1744-1901," transciption database, Society of Genealogists; Page accessed 3 Jun 2011), Baptism William Blacknell.; [Source Record]; Certainty Secondary Evidence