Playfair advised Wallace to apply for the post of professor at the Royal Military College at Great Marlow which became vacant in 1803, and one year after he was appointed there he was joined by Ivory . Thomas Leybourn's Mathematical Repository was produced by the staff at the Royal Military College and Wallace soon joined in contributing articles.
Playfair Wallace ipinapayo na mag-aplay para sa post ng mga propesor sa Royal Military College at Great Marlow na kung saan ay naging vacant sa 1803, at isang taon matapos na siya ay hihirangin doon siya ay sumali sa pamamagitan ng Ivory. Thomas Leybourn's matematiko sisidlan ay nagawa sa pamamagitan ng mga kawani sa Royal Military College at Wallace sumali sa lalong madaling panahon ng kontribusyon sa mga artikulo.