Hi Peggy,
I dont think you David was strickly in Connecticut right?
I have seen this one:
Name: David Clarey
Event Type: Immigration
Event Date: 21 May 1851
Event Place: New York City, New York, New York, United States
Gender: Male
Age: 18
Birthplace: Great Britain
Occupation: Immigrant
Relationship to Head of Household:
Ship Name: ISAAC WEBB
Birth Year (Estimated): 1833
Departure Port: LIVERPOOL
Literacy:
Residence Place:
Destination Place: USA
Transit or Travel Compartment:
Affiliate Manifest ID: 5278
Affiliate Publication Title: Famine Irish Passenger Record Data File (FIPAS), 1846-1851
Affiliate ARC Identifier: 569666
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Appears to fit your information
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1870-This David is married to a Mary - 4 kids- all born in Conneticut - But living in Pennsylvania
https://familysearch.org/pal:/MM9.1.1/MZGK-NLR====================================
Who did he marry? Did he marry in Ireland? Where and when did he die?
Do you have documents with his birth information? Parents? etc
Bye for now
Jila