The fonds consists of materials created or collected by Osborne that relate primarily to his work with the various local, provincial, national and international sports and athletic organizations throughout his career.

The fonds consists of family papers, genealogical material, manuscripts and correspondence documenting the history of the Warren family in England. Some of the family members represented in the fonds are Reverend Dawson Warren, Falkland G.E. Warren, and Charlotte Jackson. The fonds also includes biographical information about Harry Warren and copies of his publications to 1978.