Atarah - You may know this already, but from 1901 Census, Walter Marsden was living at 31 Russia Street Accrington.
He was born Church and was Apprentice Terra Cotta/Brick.
His father John was a Blacksmith born about 1852 Sykes, Yorks.
His mother was called Betty born about 1849 Helmshore, Lancs.
His siblings were :-
Betty A born about 1869 Rossendale, Lancashire, Cotton Weaver.
John J born about 1871 Church, Lancs, Joiners labourer in Printworks.
Jane born abt 1887 Helmshore, Lancashire , Cotton weaver
I have not been able to establish a connection to my John William Marsden, living Church but I may get lucky.
There is a reference on the Marsden One Name Study here, to a Walter Marsden Soldier Sculptor (Issue 24)
http://www.marsden-ons.co.uk/MFHN/Articles.htm
Further link here with picture of Heywood war memorial
http://pmsa.courtauld.ac.uk/pmsa/MR/MR-ROC20.htm
I am sure there is more about his lovely work.