I found Sigel F. Walker in the Ottawa Co 1930 Census, North 1/2 Wyandotte township:
With him were the following children:
Norris K., Age 27
Neil S., Age 26
Nolan A., Age 25
Earl M, Age 22
Basel N, Age 20
Hazel N., Age 17
Dean, Age 15
I do not know why Lizzie was not listed.
Does anyone have any information on these people. Thanks.