The 1930 Harrisburg Directory lists:
Frank I. Richardson, is listed as a teacher.
Spouse, Margaret B.
He is listed as owner, address 351 S. 13th ST.
Also listed at that address:
Helen R. Richardson, cosmetician for Emerick's Marinello Beauty Salon.
F. Irvin Richardson is listed in the 1920 Census Dauphin Co. with Margaret, born 1881 & Helen, born 1913. His birth year is listed as 1916 with other possible year as 1880.
Note spelling of his middle name.