by John Marshall, Royal Naval Biography — Hendry… (1823)
“ Captain Hendry has recently invented an ingenious piece of iron work which he terms a heel brace, and which is applicable to the lower part of a rudder, in case the lower pintles are broken by the ship grounding, or from any other casualty. To provide for the whole of the pintles going, he proposes that ships should likewise be furnished with a hoop or cap, to embrace the head of the rudder, into which the tiller is to be shipped, which will render the rudder as effectually serviceable as ever. ”
