Copy letter from Robert William Frederick Harrison, to Mr J Bottomley Harrison has ascertained that the maximum load for their coal lift is two and a half 'cwt' [hundredweight], so asks that they begin work on four coal boxes which will not exceed half a cwt each when full, providing this is a weight that a man may reasonably be expected to carry. He suggests that they be zinc lined and 'strongly made'. Harrison's official work prevented him from writing any sooner. 15 December 1905