Complex sentence: The park was created in 1979 after being purchased from the DeLaittres family, who had inturn purchased the park in 1921 from the "Tettegouche club" who had protected the area since 1910 when it was bought from the Alger-Smith Logging Company.
Split into simpler sentences: The park was created in 1979 after its purchase from the DeLaittres family, who in turn had purchased the park in 1921 from the Tettegouche Club. The Club had protected the area since 1910 when it was bought from the Alger-Smith Logging Company.