Yes, excellent work all round on this thread. I think we rather might have swamped the OP with info so hopefully they will be back once they have had a chance to go through it.
Thanks for this Meriel
Many thanks all for the additional information, couldn't find the additional baps. Interesting connection with the Earl of Arran. I wonder if John snr's father John was also employed by the Earls. John snr's job may well have included collecting rents for the Earl of Arran (as a Land Steward). It is a pity that there is no further information available for Ann Broadhurst or Sarah ? both presumably passing away rather than divorce. I wonder whether Sarah had any children. 
I am very surprised that this Tree appears to flounder in the 1700s, despite the supposed wealth that might have existed; I haven't experienced this problem with my own very much poorer families. Mention of John of Norton, must indicate someone knew/knows more (incidentally the statement John of Norton (Herts or Suffolk) meant that it is unclear as to which County Norton village was referring)
It would appear that only John & Arthur's 3 marriages produced children (19 in total) with only 1 grandchild to continue the line (though 3 more may have been born, subject to further research in the US) It would be interesting to know why these 2 brothers became clerics, their children also m clerics - a world away from the landed gentry connection of their father 
Edward appears to have got lost
John Pearson (71)   
Steward to the Earl of Arran   
(of Arran Lodge, Bognor, Sussex & 10 Upper Gloucester Place, London)   
(1772 - 23.12.1843) FS Tree on Ancestry   
(bur 29.12.1843 at All Souls Cemetery, Kensal Green, London)   
m (1) 8.11.1801 By Licence, St George, Hanover Sq, London    
Ann Broadhurst (   
(178? - )   
(dau of    
he m poss (2)   
Sarah ? (   
( - )   
(dau of    
he m (3) 3.1.1838 St Nicholas, Brighton, Sussex   
Eliza Smith (81?)   
Bognor Regis, Sussex (@1810 - poss 1892) Ringwood, Hants   
(dau of John & ?)   
she m (2) 30.12.1845 Christchurch, Marylebone, London   
Robert Richard Robinson (78)   
They lived in Paddington in 1861   
Surrey (1806 - poss 1878) Christchurch, Hants   
Unless I can find male siblings for John snr or his father, this Tree (as far as extending the line is concerned) is now extinct
sft456