ately ▁for ▁the ▁ag encies ▁who ▁need ▁this ▁information , ▁the ▁Black ▁W id ow ers ▁are ▁able ▁to ▁come ▁up ▁with ▁the ▁code , ▁purely ▁because ▁one ▁member ▁shares ▁a ▁trait ▁with ▁the ▁math ematic ian . ▁" The ▁Woman ▁in ▁the ▁Bar " ▁( E ll ery ▁Queen ' s ▁Myst ery ▁Magazine , ▁ 3 0 ▁June ▁ 1 9 8 0 ) ▁– ▁the ▁Black ▁W id ow ers ▁have ▁as ▁their ▁dinner ▁guest ▁D arius ▁Just , ▁the ▁main ▁character ▁from ▁As im ov ' s ▁mystery ▁novel ▁Mur der ▁at ▁the ▁A BA . ▁D arius ▁finds ▁himself ▁in ▁danger ▁of ▁violent ▁repr is als ▁when ▁he ▁tries ▁to ▁help ▁a ▁fright ened ▁woman ▁( he ▁knows ▁she ▁is ▁fright ened , ▁but ▁he ▁can ▁have ▁no ▁idea ▁by ▁whom ▁or ▁why ). ▁She ▁has ▁given ▁him ▁cru cial ▁non ver bal ▁communication ▁cl ues ▁which ▁the ▁Black ▁W id ow ers ▁solve . ▁As im ov ▁states ▁that ▁he ▁" th ought ▁up " ▁this ▁Black ▁W id ow ers ▁story ▁just ▁for ▁this ▁character . ▁" The ▁Driver " ▁– ▁the ▁Black ▁W id ow ers ▁consider ▁the ▁myster ious ▁death ▁of ▁a ▁ch auff eur . ▁" The ▁Good ▁Sam ar itan " ▁( E ll ery ▁Queen ' s ▁Myst ery ▁Magazine , ▁ 1 0 ▁September ▁ 1 9 8 0 ) ▁– ▁in ▁a ▁controvers ial ▁break ▁with ▁tradition , ▁a ▁woman ▁is ▁invited ▁to ▁attend ▁the ▁men - only ▁club