Another five men died shortly after returning from the Antarctic (this does not include the significant number who died on active service in the First World War): Engebret Knudsen, a member of the Belgian Antarctic Expedition, 1897–99, developed signs of mental illness and never fully recovered, died in 1900.
Lima orang lainnya meninggal tak lama setelah pulang dari Antarktika (ini tidak meliputi jumlah signifikan yang tewas pada penugasan aktif dalam Perang Dunia Pertama): Engebret Knudsen, seorang anggota Penjelajahan Antarktika Belgia, 1897–99, mengalami tanda-tanda penyakit mental dan tak pernah sepenuhnya pulih, meninggal pada 1900.