(1) He married Lady Florence Jane Taylour , daughter of Thomas Taylour , 3rd Marquess of Headfort and Amelia Thompson , on 5 August 1875 .
(2) He married Lady Florence Jane Taylour , the daughter of Thomas Taylour , 3rd Marquess of Headfort and Amelia Thompson , on 5 August 1875 .

Do these two sentences mean the same thing?
yes