Most of Eilenberg's publications from this period were on point-set topology but there were signs, even at this early stage of his career, that he was moving towards more algebraic topics. Mac Lane writes:
Karamihan ng mga Eilenberg ng mga pahayagan mula sa panahon na ito ay sa point-set topology ngunit may mga palatandaan, kahit na ito sa maagang yugto ng kanyang karera, na siya ay lumilipat patungo sa mas algebraic paksa. Mac Lane magsusulat: