ERRATA MASTERSCRIPTIE HILBERTSCHEMATA d.d. 01-06-2023 If you spot any mistakes, do not hesitate to inform me forthwith and hurl insults at my person. * Page 24, under the proof of the Lemma, the right G-action on the trivial bundle 𝔤 × P should be Ad_g^{-1} × R_g rather than Ad_g × R_g. The equivariance of ⍳ should then also follow immediately from its definition by using that g*exp(x)*g^{-1} = exp(Ad_g x). * Page 25, third line, ω_i should be an element of C^∞(U) where U be the mentioned neighbourhood. * Page 132, beneath the definition of the Hodge star, somehow all formulæ are given in the flat case. In general, the right-hand side of the local formula should contain a load of coefficients of the metric tensor. (See Wikipedia, really...) Moreover, whilst the square of the Hodge star is given correctly, it may be worth remarking that it gains the additional factor (-1)^{# minus signs in the signature of g} in the pseudo-Riemannian case. And remember... «Boþe lered and lewed, olde and ȝonge, Alle vnderstonden english tonge.»