Creditor voting restricted when claims are unliquidated, contingent, or secured by negotiable instruments unless treated as security and valued. Creditors cannot vote on unliquidated, contingent, or unascertained debts, nor on debts secured by a current bill of exchange or promissory note unless they agree to treat antecedent liabilities on the instrument as a security, estimate its value, and deduct that value from their proof for voting purposes only.