you don’t mention any location for your Darby Seery born 1730.
Griffiths valuation [ie post famine] shows the distribution for just Seery in Ireland
Belfast city: 1
Cavan: 1
Clare: 1
Dublin: 8
Dublin city: 6
Fermanagh: 15
Galway: 1
Kildare: 12
Laois: 1
Limerick: 1
Limerick city: 1
Longford: 6
Louth: 1
Mayo: 1
Meath: 5
Offaly: 23
Roscommon: 22
Sligo: 4
Tyrone: 1
Westmeath: 100
If James the father lived for another 25 -30 years he might be listed in the distribution above which is taken from the websites that cover Griffiths Valuation in Ireland ie
the quick index website is
http://www.failteromhat.com/griffiths.phpthe detailed index with map location is
http://www.askaboutireland.ie/griffith-valuation/ James Serry the father of Edward Serey might be listed in the Tithe Applotment books Edward b 1824 will not be listed this source the Irish Genealogy Hub
Seary, Edward-T: Killivannon Y: 1835-Derryvullan-Fermanagh
Seary, Jas.-T: Killivannon Y: 1835-Derryvullan-Fermanagh
Seary, John-T: Killivannon Y: 1835-Derryvullan-Fermanagh
Seary, Mary-T: Killivannon Y: 1835-Derryvullan-Fermanagh
Seary, Patrick-T: Killivannon Y: 1835-Derryvullan-Fermanagh
Seery, Edward-Tl: Crieve Hill Yr: 1832-Enniskillen-Fermanagh
Seery, James-Tl: Crieve Hill Yr: 1832-Enniskillen-Fermanagh
Seery, Mathew-Tl: Canrick Yr: 1825-Trory-Fermanagh
the national Archives Dublin has
Seery James Clonard Ballymorin Westmeath 1834
Seery James Linamore Ballymorin Westmeath 1834
Seery James Clonahard Ballymorin Westmeath 1834
Seery James Linamore Ballymorin Westmeath 1834
Seery James Croughoul Churchtown Westmeath 1824
Seery James Milltown Churchtown Westmeath 1824
Seery James Mulliganstown Clonarney Kilkenny 1824
Seery James Rathnamuddagh Dysart Westmeath 1825
Seery James Dysart Westmeath 1825
Seery James Ballymorris Kilbeggan Westmeath 1834
Seery James Longford Kilkeevin Roscommon 1832
Seery James Clementine Bougherna Kippeen and Martinstown St Mary's Castlepolland Cork
Seery James Edwd Stonestown Clonarney Kilkenny 1824
Seery James And Patk Clonmeen Castlejordan King's 1828
hoping that leads you onwards