For the Americas, Galenson's series for Barbados, 1673 to 1711, is accepted without adjustment (no data for 1685). For 1663 and 1664, Galenson's unweighted mean prices for men, women, and boys are converted into a composite price for the average slave by calculating a weighted mean – the weights being set at the ratios of 4,393 men, women, and boys disembarked in Barbados in these years and contained in a separate data set. The ratios for 1663 are: men 0.422, women, 0.470, boys, .071, girls, 0.038; for 1664, they are 0.467, 0.443, 0.062, 0.028, respectively. The price of girls, not supplied by Galenson, is set equal to the price for boys. This procedure yields £13.89 sterling as the average slave price in Barbados for 1663 and £14.58 for 1664.

For Africa, the slave price series is derived from a register of merchandise sent to Africa compiled by a committee of the governing body of the Royal African Company, the Court of Assistants. This is contained in T70, volume 1222, and has been supplemented from other RAC sources. The registers typically provide a list of merchandise and an estimate of the number of slaves or quantities of other produce the merchandise would buy. The committee provided no breakdowns of sex and age of the slaves they expected to get. However, there were few children in these early years of the English slave trade; it was understood that while captains would seek men, they would end up taking almost as many women.