discussed Cited as authority (rule) Evening Star Newspaper Company v. Phyllis Kemp and Director, Office of Workers' Compensation Programs, United States Department of Labor (2×) O’Leary pointed out that it devolved upon the Deputy Commissioner to ascertain whether or not the claim came within the coverage afforded by the Act, the final determination to be deduced from a “combination of happenings and the inferences drawn from them,” id., 340 U.S. at 507 , 91 S.Ct. at 472, 95 L.Ed. at 487 .