Johnson Co., Missouri birth register (online at Ancestry.com) records a male Downing, eighth child of the mother, born 20 Aug 1888 in Hazel Hill township, father age 61, born Montgomery Co., Ky, mother age 46, born Lafayette Co., Indiana, mother Eliza E. Burckett (? guess based on other records, actually looks more like Kurshett), residence Hazel Hill township, father Jno P. Downing, farmer.

(This register lists given names for very few of the births.)

His WW I draft registration card, filed 5 June 1917 in Johnson Co., Mo, records Curtis Lee Downing, age 28, residence Fayetteville, Mo, born 20 Aug 1888 in Fayetteville, Mo., occupation carpenter, employer Robt McMillan, Warrensburg, Mo., single, supporting mother.

The SSDI lists Lee Downing, born 20 Aug 1888, died Apr 1973, last residence Warrensburg, Johnson Co., Missouri.

Her death certificate records Mary Bell Downing, age 71, born 3 Oct 1877 in Kentucky, died 14 May 1949 in rural Hazel Hill, Warrensburg RFD 4, Johnson Co., Missouri, married, wife of Lee Downing, father William Baugh, mother’s maiden name blank, cause of death cancer of bladder, informant Lee Downing, Warrensburg, Mo, burial in Sunset Hill.

1930 census of Johnson Co., Missouri, Hazel Hill township, enumerated 17 April, lists on p. 6A as family #151/152:
Downing, Lee, 42, age at first marriage 39, b. Missouri Ky Ky, farm laborer; Mary, wife, 53, age at first marriage 19, b. Ky Ky Ky; Moosley, Everett, stepson, 23, b. Mo Mo Ky; Marion, stepson, 14, b. Mo Mo Mo; Mary, stepmother-in-law, 76, b. Ohio Ohio Ohio.