On September 18, 1899, Louis F. Weyland
     filed an application for a life insurance policy.

Note that he signed his name with the spelling "Lewis Weyland"
Here, Louis lists information about his parents, grandparents and siblings.  He
notes that his sister Matilda died at age 18, after a 3-month illness.  He does not
include the tenth Weyland sibling, his little sister Katie, who died in 1870 at the
age of only six months.