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No, this construction is impossible because it has nominal syntax (hoc domūs tēctum "the roof of this house") like the English gerund, while the Latin gerund has verbal syntax (not *in hōc scrībendō "in this writing") and governs the same case as the verb (not *epistolārum scrībere "to write of letters"). With verbs that govern the genitive, in which it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō ('to warn them of discretion > we waste time warning them of discretion').

Other than that, such syntax is probably impossible even in Late Latin, where hoc epistolārum scrībere "this writing of letters" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. *in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is the partitive genitive that depends on plūs as the object of pōnere: 'to put in more work.'

No, this construction is impossible because it has nominal syntax (hoc domūs tēctum "this house roof") like the English gerund, while the Latin gerund has verbal syntax (not *in hōc scrībendō "in this writing") and governs the same case as the verb (not *epistolārum scrībere "to write of-letters"). With verbs that govern the genitive, where it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō ('to warn them of discretion > we waste time warning them of discretion').

Other than that, nominal syntax with a gerund is probably impossible even in Late Latin, where hoc epistolārum scrībere "this writing of letters, this letter-writing" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. ?in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is the partitive genitive that depends on plūs as the object of pōnere: 'to put in more work.'

No, this construction is impossible because it involves nominal syntax (hoc domūs tēctum), while the gerund has verbal syntax (*in hōc scrībendō) and governs the same case as the verb (*epistolārum scrībere). With verbs that govern the genitive, in which it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō.

Other than that, such syntax is probably impossible even in Late Latin, where hoc epistolārum scrībere "this writing of letters" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. *in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is indeed the object of pōnere: 'to put in some work.' The grammar becomes more apparent if you add an explicit pronoun: (nescio/ali)quid operae.

No, this construction is impossible because it has nominal syntax (hoc domūs tēctum "the roof of this house") like the English gerund, while the Latin gerund has verbal syntax (not *in hōc scrībendō "in this writing") and governs the same case as the verb (not *epistolārum scrībere "to write of letters"). With verbs that govern the genitive, in which it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō ('to warn them of discretion > we waste time warning them of discretion').

Other than that, such syntax is probably impossible even in Late Latin, where hoc epistolārum scrībere "this writing of letters" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. *in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is the partitive genitive that depends on plūs as the object of pōnere: 'to put in more work.'

No, this construction is impossible because it involves nominal syntax (huijus domūs tēctum), while the gerund has verbal syntax and governs the same case as the verb (*epistolārum scrībere; *in hōc scrībendō). With verbs that govern the genitive, in which it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō.

Other than that, such syntax is probably impossible even in Late Latin, where illud epistolārum scrībere "that writing of letters" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. *in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is indeed the object of pōnere: 'to put in some work.' The grammar becomes more apparent if you add an explicit pronoun like (nescio/ali)quid operae.

No, this construction is impossible because it involves nominal syntax (hoc domūs tēctum), while the gerund has verbal syntax (*in hōc scrībendō) and governs the same case as the verb (*epistolārum scrībere). With verbs that govern the genitive, in which it expresses the stimulus that evokes some feeling (memory, pity, incrimination), you can say:

• eōs prūdentiae monēmus > tempus perdimus eōs prūdentiae monendō.

Other than that, such syntax is probably impossible even in Late Latin, where hoc epistolārum scrībere "this writing of letters" becomes grammatical. That said, due to the suppletive relationship¹ between the infinitive and the gerund, it wouldn't surprise me to find a substantive-like prepositional use, eg. *in epistolārum scrībendō in Late/Medieval Latin.

1: the infinitive serves as the nominative of the gerund.

In the Cicero quote, operae is indeed the object of pōnere: 'to put in some work.' The grammar becomes more apparent if you add an explicit pronoun: (nescio/ali)quid operae.