of Sandy as a colleague over many years: - of his general cheerfulness and occasional quick wit. - of his incisive analyses of issues and problems both within and beyond his science. - of some interesting lunchtime conversations and discussions. My deepest sympathy to Lois and family. John C

A fearless friend and mentor, pure of  heart and generous of spirit. Sandy deeply touched my life and will be remembered with great fondness and love. Forged in Scotland 91 years past.  With deepest sympathy to Lois and the family. Jacqui.