Distribution of ln(M) for the selected subset of clumps in the ℓ = 30° (top) and ℓ = 59° (bottom) fields. Vertical bars show Poisson errors. The solid lines show one realization of the posterior distributions (corresponding to the mean values obtained with the Metropolis-Hastings method, see Sect. 4.3) discussed in Sect. 5. The vertical dashed lines represent the completeness limits as described in Paper I.