Wendy, I've tried looking for this family for you, but can't come up with the same birth date for Harry.I did find a Harry born 1-1877 that looks like it could fit.This is the only Harry Margarum that I have been able to find for that time perios.Let me know if this might be the right family.
1880 Bucks Co., PA census, Southhampton Twp., ED 166, sheet 21, pg 115a, enumerated 6-11-1880 200 225 Margerum Jos B Head W M 40 M Farmer PAPAPA Lizzie H Wife W F 31 M Keeping House PAPAPA S Fenton Son W M 09 S PAPAPA Walter Son W M 05 S PAPAPA Harry Son W M 03 S PAPAPA Elliot Son W M 6/12 S Dec PAPAPA Hillyea Rachel L Servant W F 59 Wd Servant PAPAPA McMain William Servant W M 43 S Works on farm PAPAPA
1900 Wyandotte Co., KS census, Kansas City, ED 152, sheet 12b, pg b, enumerated 6-4-1900 628 241 246 Margerum Joseph B Head W M Jun 1840 59 M 26 PAPAPA Butcher Owns Mortgage Elizabeth H Wife W F Sep 1848 51 M 26 5/5 PAPAPA Harry Son W M Jan 1877 23 S PAPAPA Asst Mgr Elliot F Son W M Dec 1879 20 S PAPAPA Day Laborer Lilly V Daughter W F Apr 1882 18 S KSPAPA At School Laura D Daughter W F Jul 1885 14 S KSPAPA At School
1910 Vigo Co., IN census, Harrison Twp., Poplar St., Terre Haute City, ED 141, sheet 8b, pg b, enumerated 4-21-1910 170 Margarum Harry J Head M W 33 M 0 PAPAPA ??? Dry Goods Store Rents Blanche Wife F W 21 M 0 IONYMO None
1920 Cook Co., IL census, Chicago, 1829 N Humbal St., ED 2222, sheet 8b, pg b, enumerated 1-9-1920 101 177 Margerum Harry Head M W 40 M PAPAPA Buyer Dry Goods Rents Blanche Wife F W 29 M ILMOMO Saleslady Dry Goods Helen Daughter F W 08 S INPAIL Harry Jr Son M W 05 S ILPAIL 178 Hand Eva Head F W 57 Wd MOSwitGer Rents Clarence Son M W 20 S ILMOMO Salesman Shoe Store sheet 9a Hand Edna Daughter F W 26 S ILMOMO Comptometer Wholesale Grocer