Well, well, well Stephen that truely is some story. Can't imagine how that would have affected the Lally Family at the time, not to mention the other neighbours around. Yes, I think it's a fair assumption to say that William was indeed Insane. It not really suprising then that Patrick would have headed off to London, in search of work and possiblity to excape all this.
Lally's Cannon and Coens are all names I have heard of even today in the Attmyon area of the Parish of Kiltullagh Killimordaly (it would be the Killimordaly side of the parish).
Is this your family on the 1861 census in London? Naming the eldest James William after his brothers and father would be common
Name:Patrick LallyAge:42Estimated Birth Year:abt 1819Relation:HeadSpouse's Name:Elizabeth LallyGender:MaleWhere born:Galway, Ireland Civil parish:Kensington St Mary AbbottEcclesiastical parish:St Mary AbbottTown:KensingtonCounty/Island:MiddlesexCountry:England
Patrick Lally 42
Elizabeth Lally 40
Jas Wm Lally 12
George Thos Lally 10
John Lally 9
Joseph I Lally 7
Sarah A Lally 6
Mary L Lally 5
Eliza A Lally 2
Agatha M Lally 1
======================================
Ireland, Tithe Applotment Books, 1823-1837
Name: James Lally
County: Galway
Parish: Killimordaly
Townland: Allymon
Year: 1837
Name: James Lally
County: Galway
Parish: Killimordaly
Townland: Allymon
Year: 1847
[Note: Allymon=Attymon]
Tithe Apploments
Killimordaly Civil Parish
ca 1821-1826
Surname First Townland
Lally James Attymon
Lally Lacky Attymon
Lally widow Attymon
=================
Stephen, I'm including here all Lally surnames mentioned on the 1821 Census of Kiltullagh Killimordaly...it may/maynot help1821 Census Kiltullagh
Carnalea
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Kelly Daniel 22 Servent
Mary Wife 23
Tom Brother 15
Lally Honora M-in-law
Carraroe
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Little Robert 50 Farmer, gardener 18
Thomas Son 21
William Son 19
Michael Son 16
Robert Son 14
ElizbethDaughter 12
Anne Daughter 10
Mary Daughter 8
Lally Elizbeth Niece 22
Brett Mary House-servant 16
Lisnaherrick (Knockatogher)
----------------------------
Lally Mary 60
Ward Hanora Daughter 20 Flax spinner
-------
Green John 37 Herd, labourer
Hanora Wife 30
CathrineDaughter 14
Anne Daughter 8
Michael Son 5
William Son 2
Lally Bryan Brother-in-law 40 Labourer
-------
Mitchell Michael 40 Farmer, labourer
John Son 4
Mary Daughter 2
James Brother 36 Labourer
Lally Kitty Niece 10
Brien Hanora 60 Pauper
Poulatullane
------------
Coghlan Peter 37 Farmer, miller 13
Frances Wife 30
Michael Son 5
John Son 2
Mary Daughter 10
Peter Step-son 13
James Step-son 10 Apprentice
Mary Sister 35
Lally Michael 25 Labourer
Geoghegan Peggy 29 House-servant
Cregville
---------
Lally Pat 48 Cooper, labourer
Bridget Wife 40
Denis Son 15 Apprentice
Pat Son 11
Jane Daughter 18 Flax spinner
Eleanor Daughter 5
I'm on email at kiltullaghkillimordaly@gmail.com if by chance I don't catch up on post here.
All the very best with the "new" search
Michelle