This does seem to be the correct family - as Caroline appears to have been christened before Thomas & Elizabeth married in 1830

Managing via Family Search to find this family on Ancestry 1841 census - the surname has been transcribed as HEARNS

1841 Census, Worcestershire
St Nicholas
Worcester North
District 5
Page 6 of 18

Thomas appears - as you say - to be a Leather Dresser and born in the County

? There is a Caroline HUMIS - buried 10 February 1848, Worcester