There have been two accruals. The first accrual (13-2009) consists of a variety of materials documenting Walker’s professional career and interests including medical correspondence, published off prints and early sketches of a dissected rabbit (1913). There are also page proofs and preparatory material on Daylight through the Mountains (1957), political memorabilia and speeches. There is also general correspondence, of which a highlight is a carbon copy of letter to Prime Minister Louis St. Laurent dated August 27, 1951 proposing the building of a National Library with a signed reply from St. Laurent dated August 31, 1951. The second accrual (77-2009) consists of research materials gathered and compiled by Walker on Frederic Newton Gisborne (1824-1892), an engineer and inventor, for his proposed book, "Cables of Confederation". There is also a copy of a letter to former premier, Joseph R. Smallwood, 1966; printing blocks; and spoons.