Details of the obituary were found on the FamilySearch website:
William Nash, Esq
British Newspaper Archive, Family Notices
Name: William Nash, Esq
Event Type: Obituary
Event Date: 6 Apr 1858
Event Place: Lewes, Sussex, England, United Kingdom
Event Place (Original): Lewes, Sussex, England
Event Place Note: 1710-1966
Gender: Male
Age: 81
Birth Year (Estimated): 1777
Death Date: 24 Mar 1858
Newspaper: Sussex Advertiser
Page Number: 6
Publication Date: 6 Apr 1858
"British Newspaper Archive, Family Notices," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:QPZQ-V7T6 : 17 April 2019), William Nash, Esq, Lewes, Sussex, England, United Kingdom; records extracted FamilySearch and images digitized by FindMyPast; citing Lewes, Sussex, England, United Kingdom, 6 Apr 1858, The British Newspaper Archive, Ireland; FHL microfilm . Accessed 25 Sep 2020.
Thank you.