We're also descended from Williamand Dinah Wallder. We have census pages showing the family from 1881 and from 1861. My line is through their son Henry who was born in 1862. He married Mary Gillam in 1883. Their son is also Henry. He is my g-grandfather. We haven't gone back further than William and Dinah, so if you know of any other information, we'd love to hear from you.
We have our family tree on genesreunited, so if you are registered, let me know and I'll allow you to have access to it.