. ▁He ▁co - author ed ▁an ▁article ▁on ▁rag time ▁piano ▁roll s . ▁Vari ous ▁authors ▁have ▁noted ▁that ▁he ▁had ▁either ▁the ▁largest ▁collection ▁of ▁rag time ▁piano ▁roll s ▁in ▁the ▁world , ▁or ▁one ▁of ▁them . ▁In ▁addition , ▁he ▁often ▁made ▁his ▁significant ▁collection ▁of ▁rag time ▁piano ▁sheet ▁music ▁available , ▁e . g ., ▁as ▁in ▁the ▁publication ▁of ▁a ▁definit ive , ▁two - volume ▁set ▁of ▁Scott ▁J op lin ' s ▁collected ▁ra gs . ▁His ▁relatively ▁early ▁convers ations ▁with ▁rag time ▁figures ▁such ▁as ▁Bob ▁D arch ▁and ▁Arthur ▁Marshall ▁have ▁led ▁to ▁discover ies ▁in ▁the ▁history ▁of ▁rag time . ▁Att endant ▁on ▁the ▁film ▁The ▁St ing , ▁popular ▁interest ▁in ▁rag time ▁was ▁power fully ▁renew ed . ▁During ▁his ▁performance ▁years ▁at ▁the ▁Show bo at ▁Golden rod , ▁T ichen or ▁did ▁a ▁brief ▁st int ▁around ▁ 1 9 7 1 ▁at ▁community ▁radio ▁station ▁K D NA - FM , ▁St . ▁Louis . ▁In ▁a ▁one - hour ▁week ly ▁program , ▁he ▁introduced ▁the ▁radio ▁audience ▁to ▁the ▁history ▁of ▁rag time . ▁He ▁contributed ▁two ▁volumes ▁of ▁a ▁total ▁of ▁ 1 2 7 ▁ra gs ▁which ▁gave ▁a ▁bro ader ▁perspective ▁on ▁the ▁kind ▁and ▁quality ▁of ▁rag time ▁piano ▁music ▁of ▁the ▁years ▁between ▁ 1 8 9 7 ▁and ▁ 1 9 1 7 . ▁R ag time ▁R ar ities ▁was ▁published ▁in ▁