In 1881 , he married Agnes Theodora Walther , daughter of Vagn Petersson , and his son is the botanist and sketch artist Vilhelm Theodor Walther .
He married Agnes Theodora Walther , the daughter of Vagn Petersson , in 1881 and his son is the botanist and sketch artist Vilhelm Theodor Walther .

Do these sentences mean the same thing?
yes