Came across a mention in the London Philatelic Journal of 1906 about the London International Philatelic Exhibition of the same year:
H.R.H. PRINCE EDWARD OF WALES (Liberia).—A fine collection of unused
stamps, mostly in pairs, practically complete from the first perforated issue. All these
stamps are worthy of attention through their superb condition, and nearly all have the
full original gum.
He was President of the Royal Philatelic Society until he became king in 1910
Wonder what happened to his stamps!