With only four in suit, lead king after ten.
(b.) If ten forces ace:—
With more than four in suit, lead knave after ten.
With only four in suit, lead queen after ten.
The common practice is (or was) to lead queen after ten, in all cases, to inform your partner that the lead was from king, queen, knave, ten, and not from king, knave, ten. But, if the ten wins the trick, the mere fact of continuing with a high card informs your partner that the lead was from king, queen, knave, ten; for, with the only other combination from which ten is first led, (viz., king, knave, ten), if the ten wins, the next lead is a small card.
If the ten forces the ace, and your partner can give you credit for not leading a losing card when you hold a winning one, he is informed, by the second lead of any high card but the king, that you led from king, queen, knave, ten. Therefore, queen and knave are high indifferent cards, and you select the knave to show five or more originally; the queen to show four exactly (see Appendix A).
King, queen, knave, and more than one small.
Lead knave.
With more than five in suit, lead queen after knave.
With only five in suit, lead king after knave.