Do you mean Melbourne Australia, or Melbourne Derbyshire? - Not clear from your post.
If it's UK, Ancestry has National Probate Calendar which will give you information.
In fact there is an entry for William Paulin for 1898 in it - you'll need a subscription , or probably free access at your local library.
If it's Ancestry, there are having a free 'Search Australian Records' weekend - Australia Day Monday.